&& m.getRawParameterTypes().size() == 0
            && (accessorType != PropertyAccessorType.IS_GETTER || m.getRawReturnType().isEquivalentTo(Boolean.TYPE) || m.getRawReturnType().isEquivalentTo(Boolean.class));
    }

    private static boolean isSetter(JavaMethod m, PropertyAccessorType accessorType) {
        return !m.getModifiers().contains(JavaModifier.STATIC)

            boolean hasSetter = hasSetter(javaMethod);
            Class<?> expectedReturnType = hasSetter ? mutableType : immutableType;
            boolean satisfied = javaMethod.getRawReturnType().isAssignableTo(expectedReturnType);
            String message = createMessage(javaMethod, (satisfied ? "has " : "does not have ") + "raw return type assignable to " + expectedReturnType.getName());