GeglConnection * gegl_connection_new (GeglNode *sink,GeglPad *sink_pad,GeglNode *source,GeglPad *source_pad);
GeglNode *
gegl_connection_get_source_node (GeglConnection *self);
void gegl_connection_set_sink_node (GeglConnection *self,GeglNode *sink);
void gegl_connection_set_sink_pad (GeglConnection *self,GeglPad *sink_pad);
void gegl_connection_set_source_node (GeglConnection *self,GeglNode *source);
void gegl_connection_set_source_pad (GeglConnection *self,GeglPad *source_pad);