chromium/mojo/public/interfaces/bindings/tests/data/validation/conformance_mthd14_good_uknown_extensible_enum_value.data

[dist4]message_header  // num_bytes
[u4]0                  // version
[u4]0                  // interface ID
[u4]14                 // name
[u4]0                  // flags
[u4]0                  // padding
[anchr]message_header

[dist4]method14_params // num_bytes
[u4]0                  // version
[u4]0                  // param0
[u4]0xFFFFFFFF         // param1: Unknown value is okay for extensible enum.
[anchr]method14_params