Asserts that all messages previously indicated via
g_test_expect_message() have been seen and suppressed.
This API may only be used with the old logging API (g_log() without
G_LOG_USE_STRUCTURED defined). It will not work with the structured logging
API. See [Testing for Messages][testing-for-messages].
If messages at
G_LOG_LEVEL_DEBUG are emitted, but not explicitly
g_test_expect_message() then they will be ignored.
|This function is not directly available to language bindings|