[ReactNative] Support loading sourcemaps from sourceMappingURL

ReactKit/Modules/RCTSourceCode.m

@@ -0,0 +1,21 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#import "RCTSourceCode.h"
+
+#import "RCTAssert.h"
+#import "RCTUtils.h"
+
+@implementation RCTSourceCode
+
+- (void)getScriptText:(RCTResponseSenderBlock)successCallback failureCallback:(RCTResponseSenderBlock)failureCallback
+{
+  RCT_EXPORT();
+  if (self.scriptText && self.scriptURL) {
+    successCallback(@[@{@"text": self.scriptText, @"url":[self.scriptURL absoluteString]}]);
+  } else {
+    failureCallback(@[RCTMakeError(@"Source code is not available", nil, nil)]);
+  }
+
+}
+
+@end