Returns the list of images currently open.
>>> gimp.image_list()
Return the last opened image reference.
>>> pdb.gimp.image_list()[0]
Find a layer with a given name in an image.
>>> pdb.gimp_image_get_layer_by_name(image, name)
Returns the list of layers contained in the specified image.
>>> pdb.gimp_image_get_layers(image)