This function writes a debug message to the standard error. Depending on the settings of the AFC Base class, messages passed to the afc_debug function may be shown or simply ignored. See afc_set_tag() for more info. The message is composed most likely the standard printf-family functions. If you are looking for something easier to use, please consider afc_debug() function.
Pointer to a valid afc instance.
The debug message level. Valid values are
This is a very important message that needs to be shown
This is a standard-importance message.
This is a very informative message.
The name of the class raising the error.
String format, specified in the same way you do with printf.
All params needed by the provieded fmt.