ROOT (token: short_text [lag_newlines/spaces] {pos_id})               
 ¦--expr: names [0/0] {1}                                             
 ¦   ¦--expr: names [0/1] {3}                                         
 ¦   ¦   °--SYMBOL: names [0/0] {2}                                   
 ¦   ¦--LEFT_ASSIGN: <- [0/1] {4}                                     
 ¦   °--expr: c(SL  [0/0] {5}                                         
 ¦       ¦--expr: c [0/0] {7}                                         
 ¦       ¦   °--SYMBOL_FUNCTION_CALL: c [0/0] {6}                     
 ¦       ¦--'(': ( [0/0] {8}                                          
 ¦       ¦--SYMBOL_SUB: SL [0/1] {9}                                  
 ¦       ¦--EQ_SUB: = [0/1] {10}                                      
 ¦       ¦--expr: 'Sepa [0/0] {12}                                    
 ¦       ¦   °--STR_CONST: 'Sepa [0/0] {11}                           
 ¦       °--')': ) [0/0] {13}                                         
 ¦--expr: head( [1/0] {14}                                            
 ¦   ¦--expr: head [0/0] {16}                                         
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: head [0/0] {15}                     
 ¦   ¦--'(': ( [0/0] {17}                                             
 ¦   ¦--expr: dplyr [0/0] {18}                                        
 ¦   ¦   ¦--expr: dplyr [0/0] {19}                                    
 ¦   ¦   ¦   ¦--SYMBOL_PACKAGE: dplyr [0/0] {20}                      
 ¦   ¦   ¦   ¦--NS_GET: :: [0/0] {21}                                 
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: renam [0/0] {22}                
 ¦   ¦   ¦--'(': ( [0/0] {23}                                         
 ¦   ¦   ¦--expr: iris[ [0/0] {24}                                    
 ¦   ¦   ¦   ¦--expr: iris [0/0] {26}                                 
 ¦   ¦   ¦   ¦   °--SYMBOL: iris [0/0] {25}                           
 ¦   ¦   ¦   ¦--'[': [ [0/0] {27}                                     
 ¦   ¦   ¦   ¦--',': , [0/0] {28}                                     
 ¦   ¦   ¦   ¦--expr: 1:2 [0/0] {29}                                  
 ¦   ¦   ¦   ¦   ¦--expr: 1 [0/0] {31}                                
 ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {30}                       
 ¦   ¦   ¦   ¦   ¦--':': : [0/0] {32}                                 
 ¦   ¦   ¦   ¦   °--expr: 2 [0/0] {34}                                
 ¦   ¦   ¦   ¦       °--NUM_CONST: 2 [0/0] {33}                       
 ¦   ¦   ¦   °--']': ] [0/0] {35}                                     
 ¦   ¦   ¦--',': , [0/1] {36}                                         
 ¦   ¦   ¦--expr: ! ! ! [0/0] {37}                                    
 ¦   ¦   ¦   ¦--'!': ! [0/1] {38}                                     
 ¦   ¦   ¦   °--expr: ! ! n [0/0] {39}                                
 ¦   ¦   ¦       ¦--'!': ! [0/1] {40}                                 
 ¦   ¦   ¦       °--expr: ! nam [0/0] {41}                            
 ¦   ¦   ¦           ¦--'!': ! [0/1] {42}                             
 ¦   ¦   ¦           °--expr: names [0/0] {44}                        
 ¦   ¦   ¦               °--SYMBOL: names [0/0] {43}                  
 ¦   ¦   °--')': ) [0/0] {45}                                         
 ¦   ¦--',': , [0/1] {46}                                             
 ¦   ¦--expr: 3 [0/0] {48}                                            
 ¦   ¦   °--NUM_CONST: 3 [0/0] {47}                                   
 ¦   °--')': ) [0/0] {49}                                             
 ¦--expr: head( [1/0] {50}                                            
 ¦   ¦--expr: head [0/0] {52}                                         
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: head [0/0] {51}                     
 ¦   ¦--'(': ( [0/0] {53}                                             
 ¦   ¦--expr: dplyr [0/0] {54}                                        
 ¦   ¦   ¦--expr: dplyr [0/0] {55}                                    
 ¦   ¦   ¦   ¦--SYMBOL_PACKAGE: dplyr [0/0] {56}                      
 ¦   ¦   ¦   ¦--NS_GET: :: [0/0] {57}                                 
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: renam [0/0] {58}                
 ¦   ¦   ¦--'(': ( [0/0] {59}                                         
 ¦   ¦   ¦--expr: iris[ [0/0] {60}                                    
 ¦   ¦   ¦   ¦--expr: iris [0/0] {62}                                 
 ¦   ¦   ¦   ¦   °--SYMBOL: iris [0/0] {61}                           
 ¦   ¦   ¦   ¦--'[': [ [0/0] {63}                                     
 ¦   ¦   ¦   ¦--',': , [0/0] {64}                                     
 ¦   ¦   ¦   ¦--expr: 1:2 [0/0] {65}                                  
 ¦   ¦   ¦   ¦   ¦--expr: 1 [0/0] {67}                                
 ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {66}                       
 ¦   ¦   ¦   ¦   ¦--':': : [0/0] {68}                                 
 ¦   ¦   ¦   ¦   °--expr: 2 [0/0] {70}                                
 ¦   ¦   ¦   ¦       °--NUM_CONST: 2 [0/0] {69}                       
 ¦   ¦   ¦   °--']': ] [0/0] {71}                                     
 ¦   ¦   ¦--',': , [0/0] {72}                                         
 ¦   ¦   ¦--expr: !! !  [0/0] {73}                                    
 ¦   ¦   ¦   ¦--'!': ! [0/0] {74}                                     
 ¦   ¦   ¦   °--expr: ! ! n [0/0] {75}                                
 ¦   ¦   ¦       ¦--'!': ! [0/1] {76}                                 
 ¦   ¦   ¦       °--expr: ! nam [0/0] {77}                            
 ¦   ¦   ¦           ¦--'!': ! [0/1] {78}                             
 ¦   ¦   ¦           °--expr: names [0/0] {80}                        
 ¦   ¦   ¦               °--SYMBOL: names [0/0] {79}                  
 ¦   ¦   °--')': ) [0/0] {81}                                         
 ¦   ¦--',': , [0/1] {82}                                             
 ¦   ¦--expr: 3 [0/0] {84}                                            
 ¦   ¦   °--NUM_CONST: 3 [0/0] {83}                                   
 ¦   °--')': ) [0/0] {85}                                             
 ¦--expr: head( [1/0] {86}                                            
 ¦   ¦--expr: head [0/0] {88}                                         
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: head [0/0] {87}                     
 ¦   ¦--'(': ( [0/0] {89}                                             
 ¦   ¦--expr: dplyr [0/0] {90}                                        
 ¦   ¦   ¦--expr: dplyr [0/0] {91}                                    
 ¦   ¦   ¦   ¦--SYMBOL_PACKAGE: dplyr [0/0] {92}                      
 ¦   ¦   ¦   ¦--NS_GET: :: [0/0] {93}                                 
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: renam [0/0] {94}                
 ¦   ¦   ¦--'(': ( [0/0] {95}                                         
 ¦   ¦   ¦--expr: iris[ [0/0] {96}                                    
 ¦   ¦   ¦   ¦--expr: iris [0/0] {98}                                 
 ¦   ¦   ¦   ¦   °--SYMBOL: iris [0/0] {97}                           
 ¦   ¦   ¦   ¦--'[': [ [0/0] {99}                                     
 ¦   ¦   ¦   ¦--',': , [0/0] {100}                                    
 ¦   ¦   ¦   ¦--expr: 1:2 [0/0] {101}                                 
 ¦   ¦   ¦   ¦   ¦--expr: 1 [0/0] {103}                               
 ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {102}                      
 ¦   ¦   ¦   ¦   ¦--':': : [0/0] {104}                                
 ¦   ¦   ¦   ¦   °--expr: 2 [0/0] {106}                               
 ¦   ¦   ¦   ¦       °--NUM_CONST: 2 [0/0] {105}                      
 ¦   ¦   ¦   °--']': ] [0/0] {107}                                    
 ¦   ¦   ¦--',': , [0/1] {108}                                        
 ¦   ¦   ¦--expr: !!!na [0/0] {109}                                   
 ¦   ¦   ¦   ¦--'!': ! [0/0] {110}                                    
 ¦   ¦   ¦   °--expr: !!nam [0/0] {111}                               
 ¦   ¦   ¦       ¦--'!': ! [0/0] {112}                                
 ¦   ¦   ¦       °--expr: !name [0/0] {113}                           
 ¦   ¦   ¦           ¦--'!': ! [0/0] {114}                            
 ¦   ¦   ¦           °--expr: names [0/0] {116}                       
 ¦   ¦   ¦               °--SYMBOL: names [0/0] {115}                 
 ¦   ¦   °--')': ) [0/0] {117}                                        
 ¦   ¦--',': , [0/1] {118}                                            
 ¦   ¦--expr: 3 [0/0] {120}                                           
 ¦   ¦   °--NUM_CONST: 3 [0/0] {119}                                  
 ¦   °--')': ) [0/0] {121}                                            
 °--expr: my_su [1/0] {122}                                           
     ¦--expr: my_su [0/1] {124}                                       
     ¦   °--SYMBOL: my_su [0/0] {123}                                 
     ¦--LEFT_ASSIGN: <- [0/1] {125}                                   
     °--expr: funct [0/0] {126}                                       
         ¦--FUNCTION: funct [0/0] {127}                               
         ¦--'(': ( [0/0] {128}                                        
         ¦--SYMBOL_FORMALS: df [0/0] {129}                            
         ¦--',': , [0/1] {130}                                        
         ¦--SYMBOL_FORMALS: group [0/0] {131}                         
         ¦--')': ) [0/1] {132}                                        
         °--expr: {
  d [0/0] {133}                                  
             ¦--'{': { [0/2] {134}                                    
             ¦--expr: df %> [1/0] {135}                               
             ¦   ¦--expr: df [0/1] {138}                              
             ¦   ¦   °--SYMBOL: df [0/0] {137}                        
             ¦   ¦--SPECIAL-PIPE: %>% [0/4] {139}                     
             ¦   ¦--expr: group [1/1] {140}                           
             ¦   ¦   ¦--expr: group [0/0] {142}                       
             ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: group [0/0] {141}   
             ¦   ¦   ¦--'(': ( [0/1] {143}                            
             ¦   ¦   ¦--expr: ! ! g [0/0] {144}                       
             ¦   ¦   ¦   ¦--'!': ! [0/1] {145}                        
             ¦   ¦   ¦   °--expr: ! gro [0/0] {146}                   
             ¦   ¦   ¦       ¦--'!': ! [0/1] {147}                    
             ¦   ¦   ¦       °--expr: group [0/0] {149}               
             ¦   ¦   ¦           °--SYMBOL: group [0/0] {148}         
             ¦   ¦   °--')': ) [0/0] {150}                            
             ¦   ¦--SPECIAL-PIPE: %>% [0/4] {151}                     
             ¦   °--expr: summa [1/0] {152}                           
             ¦       ¦--expr: summa [0/0] {154}                       
             ¦       ¦   °--SYMBOL_FUNCTION_CALL: summa [0/0] {153}   
             ¦       ¦--'(': ( [0/0] {155}                            
             ¦       ¦--SYMBOL_SUB: a [0/1] {156}                     
             ¦       ¦--EQ_SUB: = [0/1] {157}                         
             ¦       ¦--expr: mean( [0/0] {158}                       
             ¦       ¦   ¦--expr: mean [0/0] {160}                    
             ¦       ¦   ¦   °--SYMBOL_FUNCTION_CALL: mean [0/0] {159}
             ¦       ¦   ¦--'(': ( [0/0] {161}                        
             ¦       ¦   ¦--expr: a [0/0] {163}                       
             ¦       ¦   ¦   °--SYMBOL: a [0/0] {162}                 
             ¦       ¦   °--')': ) [0/0] {164}                        
             ¦       °--')': ) [0/0] {165}                            
             °--'}': } [1/0] {166}                                    
