Does nothing if err is null; if err is non-null, then *err
must be null. A new #GError is created and assigned to *err.
Unlike glib.global.setError, message is not a printf()-style format string.
Use this function if message contains text you don't have control over,
that could include printf() escape sequences.
Does nothing if err is null; if err is non-null, then *err must be null. A new #GError is created and assigned to *err. Unlike glib.global.setError, message is not a printf()-style format string. Use this function if message contains text you don't have control over, that could include printf() escape sequences.