Registers a postprocessor to be instantiated on library initialisation by creating a PostprocessorRegistrationEntry and appending it to registeredPostprocessors.
Priority at which to instantiate the postprocessor. A lower priority makes it get instantiated before other postprocessors.
Function pointer to a "constructor"/builder that instantiates the relevant postprocessor.
See Implementation
Registers a postprocessor to be instantiated on library initialisation by creating a PostprocessorRegistrationEntry and appending it to registeredPostprocessors.