code: def validate_schema(cls, tx):
          
          _validate_schema(TX_SCHEMA_COMMON, tx)
          _validate_schema(TX_SCHEMA_TRANSFER, tx)
          _validate_schema(cls.TX_SCHEMA_CUSTOM, tx)
docs: Validate the validator election vote transaction. Since `VOTE` extends `TRANSFER`
             transaction, all the validations for `CREATE` transaction should be inherited