Added the "parameters" property to the Endpoint public protocol.

Sources/Communications/Protocols/Endpoint.swift

@@ -15,27 +15,35 @@ import Foundation
 /// This protocol defines an endpoint to be used in a remote call.
 public protocol Endpoint {
     
+    // MARK: Type aliases
+    
+    typealias Parameters = [String : String?]
+    typealias Headers = [String : String]
+    
     // MARK: Properties
-
+    
     /// The scheme subcomponent for the endpoint.
     var scheme: String { get }
     
     /// The host subcomponent for the endpoint.
     var host: String { get }
-
+    
     /// The port subcomponent for the component.
     var port: Int? { get }
-
+    
     /// The path subcomponent for the endpoint.
     var path: String { get }
     
+    /// The query parameter subcomponents for the endpoint.
+    var parameters: Parameters { get }
+    
     /// The HTTP request method for the endpoint.
     var method: HTTPRequestMethod { get }
     
     /// The HTTP header fields as a dictionary for the endpoint.
-    var headers: [String: String] { get }
+    var headers: Headers { get }
     
     /// The message body as data for a request.
     var body: Data? { get }
-
+    
 }