ROOT (token: short_text [lag_newlines/spaces] {pos_id})   
 ¦--COMMENT: # add [0/0] {1}                              
 ¦--expr: if (x [1/0] {2}                                 
 ¦   ¦--IF: if [0/1] {3}                                  
 ¦   ¦--'(': ( [0/0] {4}                                  
 ¦   ¦--expr: x [0/0] {6}                                 
 ¦   ¦   °--SYMBOL: x [0/0] {5}                           
 ¦   ¦--')': ) [0/1] {7}                                  
 ¦   ¦--expr: {1 +  [0/1] {8}                             
 ¦   ¦   ¦--'{': { [0/0] {9}                              
 ¦   ¦   ¦--expr: 1 + 1 [0/0] {10}                        
 ¦   ¦   ¦   ¦--expr: 1 [0/1] {13}                        
 ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {12}               
 ¦   ¦   ¦   ¦--'+': + [0/1] {14}                         
 ¦   ¦   ¦   ¦--expr: 1 [0/1] {16}                        
 ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {15}               
 ¦   ¦   ¦   ¦--'+': + [0/1] {17}                         
 ¦   ¦   ¦   °--expr: +1 [0/0] {18}                       
 ¦   ¦   ¦       ¦--'+': + [0/0] {19}                     
 ¦   ¦   ¦       °--expr: 1 [0/0] {21}                    
 ¦   ¦   ¦           °--NUM_CONST: 1 [0/0] {20}           
 ¦   ¦   °--'}': } [0/0] {22}                             
 ¦   ¦--ELSE: else [0/1] {23}                             
 ¦   °--expr: {3} [0/0] {24}                              
 ¦       ¦--'{': { [0/0] {25}                             
 ¦       ¦--expr: 3 [0/0] {27}                            
 ¦       ¦   °--NUM_CONST: 3 [0/0] {26}                   
 ¦       °--'}': } [0/0] {28}                             
 ¦--COMMENT: # rem [2/0] {29}                             
 ¦--expr: test_ [1/0] {30}                                
 ¦   ¦--expr: test_ [0/0] {32}                            
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: test_ [0/0] {31}        
 ¦   ¦--'(': ( [0/0] {33}                                 
 ¦   ¦--expr: "x" [0/0] {35}                              
 ¦   ¦   °--STR_CONST: "x" [0/0] {34}                     
 ¦   ¦--',': , [0/10] {36}                                
 ¦   ¦--expr: {
    [1/0] {37}                           
 ¦   ¦   ¦--'{': { [0/12] {38}                            
 ¦   ¦   ¦--expr: my_te [1/10] {39}                       
 ¦   ¦   ¦   ¦--expr: my_te [0/0] {41}                    
 ¦   ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: my_te [0/0] {40}
 ¦   ¦   ¦   ¦--'(': ( [0/0] {42}                         
 ¦   ¦   ¦   ¦--expr: call [0/0] {44}                     
 ¦   ¦   ¦   ¦   °--SYMBOL: call [0/0] {43}               
 ¦   ¦   ¦   °--')': ) [0/0] {45}                         
 ¦   ¦   °--'}': } [1/0] {46}                             
 ¦   °--')': ) [0/0] {47}                                 
 ¦--COMMENT: # do  [3/0] {48}                             
 ¦--expr_or_assign_or_help: a =3 [1/0] {49}               
 ¦   ¦--expr: a [0/1] {51}                                
 ¦   ¦   °--SYMBOL: a [0/0] {50}                          
 ¦   ¦--EQ_ASSIGN: = [0/0] {52}                           
 ¦   °--expr: 3 [0/0] {54}                                
 ¦       °--NUM_CONST: 3 [0/0] {53}                       
 ¦--expr: data_ [1/0] {55}                                
 ¦   ¦--expr: data_ [0/0] {57}                            
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: data_ [0/0] {56}        
 ¦   ¦--'(': ( [0/0] {58}                                 
 ¦   ¦--SYMBOL_SUB: a [0/1] {59}                          
 ¦   ¦--EQ_SUB: = [0/1] {60}                              
 ¦   ¦--expr: 3 [0/0] {62}                                
 ¦   ¦   °--NUM_CONST: 3 [0/0] {61}                       
 ¦   °--')': ) [0/0] {63}                                 
 ¦--COMMENT: # do  [2/0] {64}                             
 ¦--expr: a <-  [1/0] {65}                                
 ¦   ¦--expr: a [0/1] {67}                                
 ¦   ¦   °--SYMBOL: a [0/0] {66}                          
 ¦   ¦--LEFT_ASSIGN: <- [0/1] {68}                        
 ¦   °--expr: funct [0/0] {69}                            
 ¦       ¦--FUNCTION: funct [0/0] {70}                    
 ¦       ¦--'(': ( [0/0] {71}                             
 ¦       ¦--SYMBOL_FORMALS: x [0/0] {72}                  
 ¦       ¦--')': ) [0/1] {73}                             
 ¦       °--expr: x + 1 [0/0] {74}                        
 ¦           ¦--expr: x [0/1] {76}                        
 ¦           ¦   °--SYMBOL: x [0/0] {75}                  
 ¦           ¦--'+': + [0/1] {77}                         
 ¦           °--expr: 1 [0/0] {79}                        
 ¦               °--NUM_CONST: 1 [0/0] {78}               
 ¦--';': ; [0/0] {80}                                     
 ¦--expr: b [0/0] {82}                                    
 ¦   °--SYMBOL: b [0/0] {81}                              
 ¦--';': ; [0/0] {83}                                     
 ¦--expr: c [0/0] {85}                                    
 ¦   °--SYMBOL: c [0/0] {84}                              
 ¦--COMMENT: # don [2/0] {86}                             
 °--expr: a %>% [1/0] {87}                                
     ¦--expr: a [0/1] {90}                                
     ¦   °--SYMBOL: a [0/0] {89}                          
     ¦--SPECIAL-PIPE: %>% [0/2] {91}                      
     ¦--expr: b [1/1] {93}                                
     ¦   °--SYMBOL: b [0/0] {92}                          
     ¦--SPECIAL-PIPE: %>% [0/2] {94}                      
     °--expr: c [1/0] {96}                                
         °--SYMBOL: c [0/0] {95}                          
