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}                 
     ¦--'(': ( [0/0] {4}                                         
     ¦--expr: call( [1/3] {5}                                    
     ¦   ¦--expr: call [0/0] {7}                                 
     ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {6}             
     ¦   ¦--'(': ( [0/3] {8}                                     
     ¦   ¦--expr: call( [1/0] {9}                                
     ¦   ¦   ¦--expr: call [0/0] {11}                            
     ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {10}        
     ¦   ¦   ¦--'(': ( [0/0] {12}                                
     ¦   ¦   ¦--expr: call( [1/3] {13}                           
     ¦   ¦   ¦   ¦--expr: call [0/0] {15}                        
     ¦   ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {14}    
     ¦   ¦   ¦   ¦--'(': ( [0/10] {16}                           
     ¦   ¦   ¦   ¦--expr: call( [1/0] {17}                       
     ¦   ¦   ¦   ¦   ¦--expr: call [0/0] {19}                    
     ¦   ¦   ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {18}
     ¦   ¦   ¦   ¦   ¦--'(': ( [0/5] {20}                        
     ¦   ¦   ¦   ¦   ¦--expr: 2 [1/3] {22}                       
     ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 2 [0/0] {21}              
     ¦   ¦   ¦   ¦   °--')': ) [1/0] {23}                        
     ¦   ¦   ¦   °--')': ) [1/0] {24}                            
     ¦   ¦   °--')': ) [1/0] {25}                                
     ¦   °--')': ) [1/0] {26}                                    
     °--')': ) [1/0] {27}                                        
