message: InitializableLookupTable: Fix compiler warning in overridden virtual method.
diff: @@ -51,7 +51,7 @@ class InitializableLookupTable : public LookupInterface {
  "Insert not supported by InitializableLookupTable implementations");
  }
  - Status ExportValues(OpKernelContext* context) {
  + Status ExportValues(OpKernelContext* context) override {
  return errors::Unimplemented(
  "ExportValues not supported by InitializableLookupTable "
  "implementations");
  