sourceSetDummyCallback
Sets a dummy callback for @source. The callback will do nothing, and if the source expects a #gboolean return value, it will return true. (If the source expects any other type of return value, it will return a 0/null value; whatever g_value_init() initializes a #GValue to for that type.)
If the source is not one of the standard GLib types, the
Parameters
source
the source