ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr: call( [0/0] {1}                              
 ¦   ¦--expr: call [0/0] {3}                           
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {2}       
 ¦   ¦--'(': ( [0/2] {4}                               
 ¦   ¦--COMMENT: # sty [1/2] {5}                       
 ¦   ¦--expr: 1+ 1 [1/0] {6}                           
 ¦   ¦   ¦--expr: 1 [0/0] {8}                          
 ¦   ¦   ¦   °--NUM_CONST: 1 [0/0] {7}                 
 ¦   ¦   ¦--'+': + [0/1] {9}                           
 ¦   ¦   °--expr: 1 [0/0] {11}                         
 ¦   ¦       °--NUM_CONST: 1 [0/0] {10}                
 ¦   ¦--',': , [0/1] {12}                              
 ¦   ¦--expr: test_ [0/0] {13}                         
 ¦   ¦   ¦--expr: test_ [0/0] {15}                     
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: test_ [0/0] {14} 
 ¦   ¦   ¦--'(': ( [0/0] {16}                          
 ¦   ¦   ¦--expr: "hier [0/0] {18}                     
 ¦   ¦   ¦   °--STR_CONST: "hier [0/0] {17}            
 ¦   ¦   ¦--',': , [0/1] {19}                          
 ¦   ¦   ¦--SYMBOL_SUB: na.rm [0/1] {20}               
 ¦   ¦   ¦--EQ_SUB: = [0/1] {21}                       
 ¦   ¦   ¦--expr: 3 [0/1] {23}                         
 ¦   ¦   ¦   °--NUM_CONST: 3 [0/0] {22}                
 ¦   ¦   ¦--',': , [0/0] {24}                          
 ¦   ¦   ¦--SYMBOL_SUB: py [0/1] {25}                  
 ¦   ¦   ¦--EQ_SUB: = [0/1] {26}                       
 ¦   ¦   ¦--expr: 43 [0/2] {28}                        
 ¦   ¦   ¦   °--NUM_CONST: 43 [0/0] {27}               
 ¦   ¦   °--')': ) [1/0] {29}                          
 ¦   °--')': ) [1/0] {30}                              
 ¦--COMMENT: # als [2/0] {31}                          
 ¦--expr: test_ [1/0] {32}                             
 ¦   ¦--expr: test_ [0/0] {34}                         
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: test_ [0/0] {33}     
 ¦   ¦--'(': ( [0/0] {35}                              
 ¦   ¦--expr: "hier [0/0] {37}                         
 ¦   ¦   °--STR_CONST: "hier [0/0] {36}                
 ¦   ¦--',': , [0/1] {38}                              
 ¦   ¦--SYMBOL_SUB: na.rm [0/1] {39}                   
 ¦   ¦--EQ_SUB: = [0/1] {40}                           
 ¦   ¦--expr: 3 [0/0] {42}                             
 ¦   ¦   °--NUM_CONST: 3 [0/0] {41}                    
 ¦   ¦--',': , [0/1] {43}                              
 ¦   ¦--SYMBOL_SUB: py [0/1] {44}                      
 ¦   ¦--EQ_SUB: = [0/1] {45}                           
 ¦   ¦--expr: 43 [0/9] {47}                            
 ¦   ¦   °--NUM_CONST: 43 [0/0] {46}                   
 ¦   °--')': ) [1/0] {48}                              
 ¦--expr_or_assign_or_help: x="ne [3/1] {49}           
 ¦   ¦--expr: x [0/0] {51}                             
 ¦   ¦   °--SYMBOL: x [0/0] {50}                       
 ¦   ¦--EQ_ASSIGN: = [0/0] {52}                        
 ¦   °--expr: "new" [0/0] {54}                         
 ¦       °--STR_CONST: "new" [0/0] {53}                
 ¦--COMMENT: # sty [0/0] {55}                          
 ¦--expr_or_assign_or_help: y=1 [1/1] {56}             
 ¦   ¦--expr: y [0/0] {58}                             
 ¦   ¦   °--SYMBOL: y [0/0] {57}                       
 ¦   ¦--EQ_ASSIGN: = [0/0] {59}                        
 ¦   °--expr: 1 [0/0] {61}                             
 ¦       °--NUM_CONST: 1 [0/0] {60}                    
 ¦--COMMENT: # non [0/0] {62}                          
 ¦--expr: more_ [2/0] {63}                             
 ¦   ¦--expr: more_ [0/0] {65}                         
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: more_ [0/0] {64}     
 ¦   ¦--'(': ( [0/2] {66}                              
 ¦   ¦--COMMENT: # sty [1/2] {67}                      
 ¦   ¦--expr: with( [1/0] {68}                         
 ¦   ¦   ¦--expr: with [0/0] {70}                      
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: with [0/0] {69}  
 ¦   ¦   ¦--'(': ( [0/4] {71}                          
 ¦   ¦   ¦--expr: argum [1/0] {73}                     
 ¦   ¦   ¦   °--SYMBOL: argum [0/0] {72}               
 ¦   ¦   °--')': ) [0/0] {74}                          
 ¦   °--')': ) [0/0] {75}                              
 ¦--expr: 1 + 1 [1/0] {76}                             
 ¦   ¦--expr: 1 [0/1] {78}                             
 ¦   ¦   °--NUM_CONST: 1 [0/0] {77}                    
 ¦   ¦--'+': + [0/1] {79}                              
 ¦   °--expr: 1 [0/0] {81}                             
 ¦       °--NUM_CONST: 1 [0/0] {80}                    
 °--expr: a(!b) [1/0] {82}                             
     ¦--expr: a [0/0] {84}                             
     ¦   °--SYMBOL_FUNCTION_CALL: a [0/0] {83}         
     ¦--'(': ( [0/0] {85}                              
     ¦--expr: !b [0/0] {86}                            
     ¦   ¦--'!': ! [0/0] {87}                          
     ¦   °--expr: b [0/0] {89}                         
     ¦       °--SYMBOL: b [0/0] {88}                   
     °--')': ) [0/0] {90}                              
