ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 °--expr:  [0/0] {1}                                   
     ¦--expr:  [0/0] {3}                               
     ¦   °--SYMBOL_FUNCTION_CALL: c [0/0] {2}          
     ¦--'(': ( [0/0] {4}                               
     ¦--SYMBOL_SUB: a [0/0] {5}                        
     ¦--EQ_SUB: = [0/1] {6}                            
     ¦--expr:  [0/0] {7}                               
     ¦   ¦--FUNCTION: funct [0/0] {8}                  
     ¦   ¦--'(': ( [0/0] {9}                           
     ¦   ¦--')': ) [0/1] {10}                          
     ¦   °--expr:  [0/0] {11}                          
     ¦       ¦--'{': { [0/5] {12}                      
     ¦       ¦--expr:  [1/2] {14}                      
     ¦       ¦   °--NUM_CONST: 33 [0/0] {13}           
     ¦       °--'}': } [1/0] {15}                      
     °--')': ) [0/0] {16}                              
