return SIGNATURE_EQUIVALENCE.wrap(input);
                }
            }
        )
    );

    /**
     * Is defined by Object or GroovyObject?
     */
    public static boolean isObjectMethod(Method method) {
        return OBJECT_METHODS.contains(SIGNATURE_EQUIVALENCE.wrap(method));
    }

        if (method.isSynthetic() || Modifier.isStatic(modifiers)) {
            return true;
        }

        // Ignore overrides of Object and GroovyObject methods
        return GroovyMethods.isObjectMethod(method);
    }

    /**
     * Tries to find the most specific declaration of a method that is not declared in a {@link Proxy} class.

        if (!Modifier.isPrivate(method.getModifiers()) && !Modifier.isStatic(method.getModifiers()) && !method.isSynthetic() && !GroovyMethods.isObjectMethod(method)) {
            problems.add(method, "A method that is not annotated as a rule must be private");
        }
    }

    private static class ConcreteRuleSourceFactory<T> implements Factory<T> {