(command.CommandList
  children: [
    (C {(Id.Lit_Other ':')})
    (command.CommandList
      children: [
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:re)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_Number '$1')}
                  spids: [2]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:4)
        )
        (C {(shift)})
      ]
    )
    (command.ForEach
      iter_name: lib
      iter_words: [{($ Id.VSub_Star '$*')}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:found)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (command_sub
                        left_token: (Token id:Id.Left_Backtick val:'`' span_id:21)
                        command_list: 
                          (command.CommandList
                            children: [
                              (command.Pipeline
                                children: [
                                  (C {(nm)} {($ Id.VSub_DollarName '$lib')})
                                  (C {(egrep)} {(DQ ($ Id.VSub_DollarName '$re'))})
                                ]
                                negated: F
                              )
                            ]
                          )
                      )
                    }
                  spids: [20]
                )
              ]
            )
            (command.Case
              to_match: {(DQ ($ Id.VSub_DollarName '$found'))}
              arms: [
                (case_arm pat_list:[{(DQ )}] spids:[47 49 51 -1])
                (case_arm
                  pat_list: [{(Id.Lit_Star '*')}]
                  action: [
                    (C {(echo)} 
                      {(DQ ($ Id.VSub_DollarName '$lib') (': ') ($ Id.VSub_DollarName '$found'))}
                    )
                  ]
                  spids: [54 55 64 -1]
                )
              ]
            )
          ]
        )
    )
  ]
)