isFunctionType isFunctionType(t: Type): Boolean Returns true if the input is the Function type. Introduced in DataWeave version 2.3.0. Parameters Name Description t The type to check. Example This example shows how isFunctionType behaves with different inputs. Source %dw 2.0 import * from dw::core::Types type AFunction = (String) -> String output application/json --- { a: isFunctionType(AFunction), b: isFunctionType(Boolean) } Output { "a": true, "b": false }