func (io IndexOptions) String() string {
	mopt := map[string]interface{}{}
	if io.keysSet {
		mopt["keys"] = io.keys
	}
	if io.trackExistenceSet {
		mopt["trackExistence"] = io.trackExistence
	}
	return fmt.Sprintf(`{"options":%s}`, encodeMap(mopt))
}
func (io IndexOptions) String() string {
	mopt := map[string]interface{}{}
	if io.keysSet {
		mopt["keys"] = io.keys
	}
	if io.trackExistenceSet {
		mopt["trackExistence"] = io.trackExistence
	}
	return fmt.Sprintf(`{"options":%s}`, encodeMap(mopt))
}
func ( io IndexOptions ) String ( ) string { mopt := map [ string ] interface { } { } if io . keysSet { mopt [ " " ] = io . keys } if io . trackExistenceSet { mopt [ " " ] = io . trackExistence } return fmt . Sprintf ( `{"options":%s}` , encodeMap ( mopt ) ) }
// String serializes this index to a JSON string.
String serializes this index to a JSON string .