@interface SDImagePipelineTransformer : NSObject <SDImageTransformer>
Pipeline transformer. Which you can bind multiple transformers together to let the image to be transformed one by one in order and generate the final image.
NoteBecause transformers are lightweight, if you want to append or arrange transformers, create another pipeline transformer instead. This class is considered as immutable.
- (nonnull instancetype)init NS_UNAVAILABLE;