(command.CommandList
  children: [
    (C {<.>} 
      {
        (DQ 
          (command_sub
            left_token: <Id.Left_DollarParen '$('>
            child: (C {<dirname>} {(DQ ($ Id.VSub_Number '$0'))})
          ) <'/bazel-common.sh'>
        )
      }
    )
    (C {<bazel>} {<test>} 
      {
        (DQ 
          (braced_var_sub
            token: <Id.VSub_Name BAZEL_ARGS>
            bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
          )
        )
      } {<'//kythe/docs/schema'>} {<'//...'>}
    )
  ]
)