| ## message with a 'name' header field and unknown 'unkn' field | |
| ## VALID_HEADER includes a LENGTH Header and LENGTH Body | |
| VALID_HEADER method_call | |
| REQUIRED_FIELDS | |
| HEADER_FIELD UNKNOWN | |
| TYPE DICT | |
| LENGTH Dict | |
| START_LENGTH Dict | |
| STRING 'int32' | |
| TYPE INT32 | |
| INT32 0x12345678 | |
| END_LENGTH Dict | |
| ALIGN 8 | |
| END_LENGTH Header | |
| START_LENGTH Body | |
| END_LENGTH Body |