[F] validateDecoratorUniqueOnNode
function validateDecoratorUniqueOnNode(   context,   type,   decorator): boolean;Parameters
| Parameter | Type | 
|---|---|
| context | DecoratorContext | 
| type | Type | 
| decorator | DecoratorFunction | 
Returns
boolean
function validateDecoratorUniqueOnNode(   context,   type,   decorator): boolean;| Parameter | Type | 
|---|---|
| context | DecoratorContext | 
| type | Type | 
| decorator | DecoratorFunction | 
boolean