(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:log)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$1')}
          spids: [19]
        )
      ]
    )
    (C {<shift>})
    (C {<exec>} {(DQ ($ Id.VSub_At '$@'))} {<-E> ($ Id.VSub_DollarName '$log')})
  ]
)