Parameter addStackParameter(Function function, String name, SourceType sourceType,
			DataType dataType, int stackOffset, String comment)
			throws InvalidInputException, DuplicateNameException {
		Parameter parameter1 =
			new ParameterImpl(name, dataType, stackOffset, function.getProgram());
		parameter1.setComment(comment);
		return function.addParameter(parameter1, sourceType);
	}
Changes the function's parameter indicated by index to be a stack
parameter with the indicated stack offset.
@param func the function
@param index the index of an existing parameter
@param stackOffset the stack offset for this parameter
Ghidra/Features/Base/src/test.slow/java/ghidra/app/merge/listing/AbstractExternalMergerTest.java