This function is meant to be called from the complete_type_info() function of a #GTypePlugin implementation, see the example for g_enum_complete_type_info() above.
Returns the first #GFlagsValue which is set in @value.
Looks up a #GFlagsValue by name.
Looks up a #GFlagsValue by nickname.
Registers a new static flags type with the name @name.