identity
A special value that is used when a field is absent from an encoded proto3 message. When encoding a proto3 message, fields that hold this value will be omitted.
| TYPE | IDENTITY |
| :--------------------------------------------- | :---------------------------- |
| All numeric types (int32, float, double, etc.) | 0 |
| Boolean | false |
| String | empty string: "" |
| Bytes | empty bytes: ByteString.EMPTY |
| Enums | enum constant with tag 0 |
| Lists (repeated types) | empty list: listOf() |Content copied to clipboard