This class has been deprecated, should no longer be referenced and
 has been removed from Grails 3.1.  As of Grails 2.5.1 and 3.0.4 an expression
 like JSON.parse('{ "a": null }').a will evaluate to null instead
 of JSONObject.Null.
| Type | Name and description | 
|---|---|
| boolean | asBoolean()Null in JSON should evaluate to false | 
| protected java.lang.Object | clone()There is only intended to be a single instance of the NULL object, so the clone method returns itself. | 
| boolean | equals(java.lang.Object object)A Null object is equal to the null value and to itself. | 
| java.lang.String | toString()Get the "null" string value. | 
| Methods inherited from class | Name | 
|---|---|
| class java.lang.Object | java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll() | 
Null in JSON should evaluate to false
There is only intended to be a single instance of the NULL object, so the clone method returns itself.
A Null object is equal to the null value and to itself.
object -  An object to test for nullness.Get the "null" string value.