type: "flatten2" def { inputs { name: "X" } outputs { name: "Out" } outputs { name: "XShape" } attrs { name: "axis" type: INT } } extra { attrs { name: "op_role" type: INT } attrs { name: "op_role_var" type: STRINGS } attrs { name: "op_namescope" type: STRING } attrs { name: "op_callstack" type: STRINGS } attrs { name: "op_device" type: STRING } }