protected function delete_metadata( $object_id, $meta_key, $meta_value = '' ) {
		return delete_metadata( $this->meta_type, $object_id, $meta_key, $meta_value, false );
	}
protected function delete_metadata( $object_id, $meta_key, $meta_value = '' ) {
		return delete_metadata( $this->meta_type, $object_id, $meta_key, $meta_value, false );
	}
protected function delete_metadata ( $ object_id , $ meta_key , $ meta_value = '' ) { return delete_metadata ( $ this -> meta_type , $ object_id , $ meta_key , $ meta_value , false ) ; }
Wrapper method for delete_metadata that can be overridden in sub classes.

@param int    $object_id  ID of the object metadata is for
@param string $meta_key   Metadata key
@param mixed $meta_value  Optional. Metadata value. Must be serializable
if non-scalar. If specified, only delete
metadata entries with this value. Otherwise,
delete all entries with the specified meta_key.
Pass `null, `false`, or an empty string to skip
this check. For backward compatibility, it is
not possible to pass an empty string to delete
those entries with an empty string for a value.

@return bool True on successful delete, false on failure.
Wrapper method for delete_metadata that can be overridden in sub classes .