tensorflow/core/ops/compat/ops_history_v1/StackPop.pbtxt

op {
  name: "StackPop"
  input_arg {
    name: "handle"
    type: DT_STRING
    is_ref: true
  }
  output_arg {
    name: "elem"
    type_attr: "elem_type"
  }
  attr {
    name: "elem_type"
    type: "type"
  }
}