Method invokeOuterMethod

src/main/java/groovy/lang/MetaClassImpl.java:1346–1360

(final Class<?> sender, final Object object, final String methodName, final Object[] arguments, final MissingMethodException mme)

    }

    private Object invokeOuterMethod(final Class<?> sender, final Object object, final String methodName, final Object[] arguments, final MissingMethodException mme) {
        if (sender == theClass ? isGroovyObject() : GroovyObject.class.isAssignableFrom(sender)) {
            var outerClass = getNonClosureOuter(sender); // check outer class nesting of call site
            if (outerClass != null && (sender == theClass || sender.isAssignableFrom(theClass))) {
                MetaClass omc = registry.getMetaClass(outerClass);
                Object target = getOuterReference(sender, object);
                try {
                    return omc.invokeMethod(outerClass, target, methodName, arguments, false, false);
                } catch (MissingMethodException e) {
                    mme.addSuppressed(e);
                }
            }
        }
        throw mme;
    }

    private Object getOuterReference(final Class<?> innerClass, final Object object) {
        Object outer = null;