Method getOuterReference

src/main/java/groovy/lang/MetaClassImpl.java:1362–1382

(final Class<?> innerClass, final Object object)

    }

    private Object getOuterReference(final Class<?> innerClass, final Object object) {
        Object outer = null;
        // non-static inner class may have outer class reference available in this$0 field
        if (!(object instanceof Class) && (innerClass.getModifiers() & Opcodes.ACC_STATIC) == 0) {
            try {
                innerClass.getDeclaredField("this$0");
                outer = getAttribute(object,"this$0");
                if (outer instanceof GeneratedClosure) {
                    outer = ((Closure<?>) outer).getThisObject(); // skip closure(s)
                }
            } catch (NoSuchFieldException ignored) {
                // an AIC is non-static but may not have this$0
            } catch (Throwable t) {
                throw new GroovyRuntimeException(t);
            }
        }
        if (outer == null) {
            outer = getNonClosureOuter(innerClass);
        }
        return outer;
    }

    /**
     * @since 6.0.0