Base class for IviPagingSource implementations that contains the the code to load data from a data source.
Signal the PagingSource to stop loading. Same as PagingSource.invalidate. See PagingSource.invalidate for details.
Registers an invalidated callback. Same as PagingSource.registerInvalidatedCallback. See PagingSource.registerInvalidatedCallback for details.
Unregisters an invalidated callback. Same as PagingSource.unregisterInvalidatedCallback. See PagingSource.unregisterInvalidatedCallback for details.