Retrieve complete sets of #GrlMedia
Create a #GrlMedia instance from an URI representing a media resource.
no operation is supported
Notify about changes in the #GrlSource.
Look up for #GrlMedia give a service specific query
Remove content from a service.
Fetch specific keys of metadata based on other metadata.
Look up for #GrlMedia given a search text
Store content in a service
Update metadata of a #GrlMedia in a service.
Store content as child of a certian parent category.
Bitwise flags which reflect the kind of operations that a #GrlSource supports.