(CommandList
  children: [
    (C {(Lit_Other ':')})
    (Sentence
      child: 
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:re) op:Equal rhs:{($ VSub_Number '$1')} spids:[2])]
          spids: [2]
        )
      terminator: <Op_Semi ';'>
    )
    (C {(shift)})
    (ForEach
      iter_name: lib
      iter_words: [{($ VSub_Star '$*')}]
      do_arg_iter: False
      body: 
        (DoGroup
          children: [
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:found)
                  op: Equal
                  rhs: 
                    {
                      (CommandSubPart
                        command_list: 
                          (CommandList
                            children: [
                              (Pipeline
                                children: [
                                  (C {(nm)} {($ VSub_Name '$lib')})
                                  (C {(egrep)} {(DQ ($ VSub_Name '$re'))})
                                ]
                                negated: False
                              )
                            ]
                          )
                        left_token: <Left_Backtick '`'>
                        spids: [21 33]
                      )
                    }
                  spids: [20]
                )
              ]
              spids: [20]
            )
            (Case
              to_match: {(DQ ($ VSub_Name '$found'))}
              arms: [
                (case_arm pat_list:[{(DQ )}] spids:[-14749-1])
                (case_arm
                  pat_list: [{(Lit_Other '*')}]
                  action: [(C {(echo)} {(DQ ($ VSub_Name '$lib') (': ') ($ VSub_Name '$found'))})]
                  spids: [52 53 62 -1]
                )
              ]
              spids: [36 42 65]
            )
          ]
          spids: [17 67]
        )
      spids: [14 -1]
    )
  ]
)