[I] FunctionType

The type of a Function in TypeSpec.

Extends

Property	Modifier	Type	Description	Overrides	Inherited from
`creating?`	`public`	`true`	If the type is currently being created.	-	`BaseType`.`creating`
`entityKind`	`readonly`	`"Type"`	Distinguishes semantic types from values and parameter constraints.	-	`BaseType`.`entityKind`
`instantiationParameters?`	`public`	`Type`[]	Legacy instantiation metadata. The compiler’s type checker does not populate this field, so its absence does not indicate whether this type is a template instance.	-	`BaseType`.`instantiationParameters`
`isFinished`	`public`	`boolean`	Reflect if a type has been finished(Decorators have been called). There is multiple reasons a type might not be finished: - a template declaration will not - a template instance that argument that are still template parameters - a template instance that is only partially instantiated(like a templated operation inside a templated interface)	-	`BaseType`.`isFinished`
`kind`	`public`	`"FunctionType"`	Discriminant for a function signature constraint rather than a callable function value.	`BaseType`.`kind`	-
`node?`	`public`	`Node`	Node used to construct this type. If the node is undefined it means the type was dynamically built. With typekit for example.	-	`BaseType`.`node`
`parameters`	`public`	`MixedFunctionParameter`[]	The parameter constraints of the function.	-	-
`returnType`	`public`	`MixedParameterConstraint`	The return type constraint of the function.	-	-