Method asType

src/main/java/org/codehaus/groovy/runtime/NullObject.java:139–142

Type conversion method for null. @return null

(final Class c)

     * @return null
     */
    public Object asType(final Class c) {
        if (c.isPrimitive()) throw new IllegalArgumentException("null to " + c);
        return null;
    }

    /**
     * Tests for equal references.