| ## has one byte extra header padding | |
| ## VALID_HEADER includes a LENGTH Header and LENGTH Body | |
| VALID_HEADER method_call | |
| HEADER_FIELD INTERFACE | |
| TYPE STRING | |
| STRING 'org.freedesktop.Foo' | |
| HEADER_FIELD MEMBER | |
| TYPE STRING | |
| STRING 'Bar' | |
| HEADER_FIELD PATH | |
| TYPE OBJECT_PATH | |
| OBJECT_PATH '/foo' | |
| HEADER_FIELD UNKNOWN | |
| TYPE STRING | |
| STRING 'a' | |
| ALIGN 8 | |
| BYTE 0 | |
| END_LENGTH Header | |
| START_LENGTH Body | |
| END_LENGTH Body |