Polls a file of type G_FILE_TYPE_MOUNTABLE.
If cancellable is not NULL, then the operation can be cancelled by
triggering the cancellable object from another thread. If the operation
was cancelled, the error G_IO_ERROR_CANCELLED will be returned.
When the operation is finished, callback will be called. You can then call
g_file_mount_mountable_finish() to get the result of the operation.
Since 2.22
Polls a file of type G_FILE_TYPE_MOUNTABLE. If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. When the operation is finished, callback will be called. You can then call g_file_mount_mountable_finish() to get the result of the operation. Since 2.22