Each transformer can reference transform option names which it claims to support, but a pipeline transformer might reference options for multiple transformers as inherited from its single-step transformers. In order to send the correct options to the correct transformer, the options are filtered for each transform request to a T-Engine.
If the applicable transformer is a single-step transformer, the request is sent to the relevant T-Engine, with the request transform options filtered based on the transformer’s supported transform options list.
If the applicable transformer is a pipeline transformer, then T-Router will filter transform options from the request for each intermediate step with respect to the current step’s transformer.