Method toString

src/main/java/groovy/util/Expando.java:146–156

This allows toString to be overridden by a closure field method attached to the expando object. @see java.lang.Object#toString()

()

     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        Object method = getProperties().get("toString");
        if (method instanceof Closure closure) {
            // invoke overridden toString closure method
            closure.setDelegate(this);
            return closure.call().toString();
        } else {
            return expandoProperties.toString();
        }
    }

    /**
     * This allows equals to be overridden by a closure <i>field</i> method attached