Parameters are declared with the annotations @IsParameter, and @AllAsParameter.
Parameter can be declared on single fields with @IsParameter.
@IsParameter float f1;
Parameters can be declared every applicable fields of an RGG with @AllAsParameter.
@AllAsParameter float f1; // Added to default PM Object o1; // Added to default PM @IsParameter("anotherPM") float f2; // Added to explicit PM called anotherPM int i1; // Added to default PM