Added correct way of default parameters

Sources/Apollo/RequestCreator.swift

@@ -27,13 +27,22 @@ public protocol RequestCreator {
 }
 
 extension RequestCreator {
+  /// Creates a `GraphQLMap` out of the passed-in operation
+  ///
+  /// - Parameters:
+  ///   - operation: The operation to use
+  /// - Returns: The created `GraphQLMap`
+  public func requestBody<Operation: GraphQLOperation>(for operation: Operation) -> GraphQLMap {
+    return requestBody(for: operation, sendOperationIdentifiers: false)
+  }
+
   /// Creates a `GraphQLMap` out of the passed-in operation
   ///
   /// - Parameters:
   ///   - operation: The operation to use
   ///   - sendOperationIdentifiers: Whether or not to send operation identifiers. Defaults to false.
   /// - Returns: The created `GraphQLMap`
-  public func requestBody<Operation: GraphQLOperation>(for operation: Operation, sendOperationIdentifiers: Bool = false) -> GraphQLMap {
+  public func requestBody<Operation: GraphQLOperation>(for operation: Operation, sendOperationIdentifiers: Bool) -> GraphQLMap {
     var body: GraphQLMap = [
       "variables": operation.variables,
       "operationName": operation.operationName,
@@ -52,6 +61,26 @@ extension RequestCreator {
     return body
   }
 
+  /// Creates multi-part form data to send with a request
+  ///
+  /// - Parameters:
+  ///   - operation: The operation to create the data for.
+  ///   - files: An array of files to use.
+  ///   - sendOperationIdentifiers: True if operation identifiers should be sent, false if not.
+  ///   - serializationFormat: The format to use to serialize data.
+  /// - Returns: The created form data
+  /// - Throws: Errors creating or loading the form  data
+  public func requestMultipartFormData<Operation: GraphQLOperation>(for operation: Operation,
+                                                                    files: [GraphQLFile],
+                                                                    sendOperationIdentifiers: Bool,
+                                                                    serializationFormat: JSONSerializationFormat.Type) throws -> MultipartFormData {
+    return try requestMultipartFormData(for: operation,
+                                        files: files,
+                                        sendOperationIdentifiers: sendOperationIdentifiers,
+                                        serializationFormat: serializationFormat,
+                                        manualBoundary: nil)
+  }
+
   /// Creates multi-part form data to send with a request
   ///
   /// - Parameters:
@@ -66,7 +95,7 @@ extension RequestCreator {
                                                                     files: [GraphQLFile],
                                                                     sendOperationIdentifiers: Bool,
                                                                     serializationFormat: JSONSerializationFormat.Type,
-                                                                    manualBoundary: String? = nil) throws -> MultipartFormData {
+                                                                    manualBoundary: String?) throws -> MultipartFormData {
     let formData: MultipartFormData
 
     if let boundary = manualBoundary {