This service specifies the control model for a clickable button which
is represented by an image.
The image to be displayed is determined by ::com::sun::star::awt::UnoControlImageControlModel::ImageURL
property specifies the URL of an image to be displayed.
Other components can register as ::com::sun::star::awt::XImageConsumer
at this producer. Then they will be notified of any change in the image to be displayed.
Whenever the ::com::sun::star::awt::UnoControlImageControlModel::ImageURL
property is changed, the model loads the specified image, and sets it as image source
at its ::com::sun::star::awt::XImageProducer. Then, all
::com::sun::star::awt::XImageConsumers are notified and supplied with
the binary data of the image.
Usually, controls acting for an ImageButton model are consumers, and use the
data stream to display the image