[F] isDeclaredInNamespace
function isDeclaredInNamespace(   type,   namespace,   options): booleanCheck if the given type is declared in the specified namespace or, optionally, its child namespaces.
Parameters
| Parameter | Type | Description | 
|---|---|---|
type | | Enum | Interface | Model | Namespace | Operation | Type | 
namespace | Namespace | Namespace | 
options | { recursive: boolean; } | - | 
options.recursive? | boolean | - | 
Returns
boolean