Add JSAbstractBridgedType

Author: j-f1

Sources/JavaScriptKit/JSValueConvertible.swift

@@ -1,18 +1,22 @@
 import _CJavaScriptKit
 
-public protocol JSBridgedType: JSValueCodable, CustomStringConvertible {
-    static var classRef: JSFunctionRef { get }
-
+// Use this protocol when your type has no single JavaScript class.
+// For example, a union type of multiple classes.
+public protocol JSAbstractBridgedType: JSValueCodable, CustomStringConvertible {
     var objectRef: JSObjectRef { get }
     init(objectRef: JSObjectRef)
 }
 
-extension JSBridgedType {
+extension JSAbstractBridgedType {
     public var description: String {
         return objectRef.toString!().fromJSValue()
     }
 }
 
+public protocol JSBridgedType: JSAbstractBridgedType {
+    static var classRef: JSFunctionRef { get }
+}
+
 public protocol JSValueEncodable {
     func jsValue() -> JSValue
 }