OptionalfilterA rule used to filter out certain values in the output JSON, which can be used to reduce the size of the output without losing any important information.
OptionalrequireForces actions to not be filtered out. This is mainly used internally to stop generic classes from outputting nonsense when the filter allows removing default actions, but it may also be useful if you want to prevent actions from disappearing entirely from the output.
An object containing options for the
serializemethod in most classes that are part of the FXR tree structure.