private static void addMethodType(@Nonnull Type methodType, @Nonnull Set<String> classNames) {
		for (Type argumentType : methodType.getArgumentTypes())
			addType(argumentType, classNames);
		Type returnType = methodType.getReturnType();
		addType(returnType, classNames);
	}
@return Set of all classes referenced in the constant pool.
recaf-core/src/main/java/software/coley/recaf/info/JvmClassInfo.java