gtk-selection-data-targets-include-image (selection writeable)

selection -- a gtk-selection-data instance
writable -- a boolean whether to accept only targets for which GTK knows how to convert a pixbuf into the format

True if the selection argument holds a list of targets, and a suitable target for images is included, otherwise false.

Given a gtk-selection-data instance holding a list of targets, determines if any of the targets can be used to provide a gdk-pixbuf object.