protected void validate ( ) { Preconditions . checkState ( ( mMultiImageRequests == null ) || ( mImageRequest == null ) , "Cannot specify both ImageRequest and FirstAvailableImageRequests!" ) ; Preconditions . checkState ( ( mDataSourceSupplier == null ) || ( mMultiImageRequests == null && mImageRequest == null && mLowResImageRequest == null ) , "Cannot specify DataSourceSupplier with other ImageRequests! Use one or the other." ) ; }
Validates the parameters before building a controller .