Asynchronously loads the contents of file as glib.Bytes
If file is a resource:// based URI, the resulting bytes will reference the
embedded resource instead of a copy. Otherwise, this is equivalent to calling
g_file_load_contents_async() and Bytes.newTake.
callback should call g_file_load_bytes_finish() to get the result of this
asynchronous operation.
Asynchronously loads the contents of file as glib.Bytes
If file is a resource:// based URI, the resulting bytes will reference the embedded resource instead of a copy. Otherwise, this is equivalent to calling g_file_load_contents_async() and Bytes.newTake.
callback should call g_file_load_bytes_finish() to get the result of this asynchronous operation.
See g_file_load_bytes() for more information.