self.visit_block(get_state.body)
    self.symbol_table.exit_scope()
    self._emit_with_loc('\n}', node)
    return list(zip(ret_ssa_values, out_types))

  def _emit_default_constant_from_proto(self, attr_def):
    """emit mlir constant statement from default value of the ArgDef proto."""
    name = self._ssa_name('cst')
    cst_ty = _get_type_from_proto(None, attr_def)
    try: