(CommandList
  children: [
    (FuncDef
      name: check
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:file)
                  op: Equal
                  rhs: {($ VSub_Number '$1')}
                  spids: [69]
                )
              ]
              spids: [69]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:pattern)
                  op: Equal
                  rhs: {($ VSub_Number '$2')}
                  spids: [73]
                )
              ]
              spids: [73]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:found)
                  op: Equal
                  rhs: 
                    {
                      (CommandSubPart
                        command_list: 
                          (CommandList
                            children: [
                              (C {(grep)} {(DQ ($ VSub_Name '$pattern'))} {($ VSub_Name '$file')})
                            ]
                          )
                        left_token: <Left_Backtick '`'>
                        spids: [78 86]
                      )
                    }
                  spids: [77]
                )
              ]
              spids: [77]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: (C {(test)} {(-z)} {(DQ ($ VSub_Name '$found'))})
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(echo)} 
                      {
                        (DQ ('pattern ') (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) 
                          ($ VSub_Name '$pattern') (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) (' not found in file ') ($ VSub_Name '$file') (.)
                        )
                      }
                    )
                    (ControlFlow token:<ControlFlow_Exit exit> arg_word:{(1)})
                  ]
                  spids: [16777215 100]
                )
              ]
              spids: [16777215 121]
            )
          ]
          spids: [66]
        )
      spids: [62 65]
    )
    (C {(check)} {(arm_attr_merge_6.stdout)} {(DQ ('Tag_MPextension_use: Allowed'))})
    (C {(check)} {(arm_attr_merge_6r.stdout)} {(DQ ('Tag_MPextension_use: Allowed'))})
    (C {(check)} {(arm_attr_merge_7.stdout)} {(DQ ('Tag_MPextension_use: Allowed'))})
    (ControlFlow token:<ControlFlow_Exit exit> arg_word:{(0)})
  ]
)