ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr: a     [0/0] {1}                              
 ¦   ¦--expr: a [0/4] {3}                              
 ¦   ¦   °--SYMBOL: a [0/0] {2}                        
 ¦   ¦--LEFT_ASSIGN: <- [0/0] {4}                      
 ¦   ¦--expr: b() [1/1] {7}                            
 ¦   ¦   ¦--expr: b [0/0] {9}                          
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: b [0/0] {8}      
 ¦   ¦   ¦--'(': ( [0/0] {10}                          
 ¦   ¦   °--')': ) [0/0] {11}                          
 ¦   ¦--PIPE: |> [0/2] {12}                            
 ¦   ¦--expr: q() [1/1] {13}                           
 ¦   ¦   ¦--expr: q [0/0] {15}                         
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: q [0/0] {14}     
 ¦   ¦   ¦--'(': ( [0/0] {16}                          
 ¦   ¦   °--')': ) [0/0] {17}                          
 ¦   ¦--PIPE: |> [0/5] {18}                            
 ¦   °--expr: g() [1/0] {19}                           
 ¦       ¦--expr: g [0/0] {21}                         
 ¦       ¦   °--SYMBOL_FUNCTION_CALL: g [0/0] {20}     
 ¦       ¦--'(': ( [0/0] {22}                          
 ¦       °--')': ) [0/0] {23}                          
 °--expr: a <-  [2/0] {24}                             
     ¦--expr: a [0/1] {26}                             
     ¦   °--SYMBOL: a [0/0] {25}                       
     ¦--LEFT_ASSIGN: <- [0/4] {27}                     
     ¦--expr: b() [0/1] {30}                           
     ¦   ¦--expr: b [0/0] {32}                         
     ¦   ¦   °--SYMBOL_FUNCTION_CALL: b [0/0] {31}     
     ¦   ¦--'(': ( [0/0] {33}                          
     ¦   °--')': ) [0/0] {34}                          
     ¦--PIPE: |> [0/2] {35}                            
     ¦--expr: c() [1/0] {36}                           
     ¦   ¦--expr: c [0/0] {38}                         
     ¦   ¦   °--SYMBOL_FUNCTION_CALL: c [0/0] {37}     
     ¦   ¦--'(': ( [0/0] {39}                          
     ¦   °--')': ) [0/0] {40}                          
     ¦--PIPE: |> [0/0] {41}                            
     °--expr: ggg() [1/0] {42}                         
         ¦--expr: ggg [0/0] {44}                       
         ¦   °--SYMBOL_FUNCTION_CALL: ggg [0/0] {43}   
         ¦--'(': ( [0/0] {45}                          
         °--')': ) [0/0] {46}                          
