anchor.diff:        // fast objects by calling "convertToFastObject" (see
         // [emitConvertToFastObjectFunction]).
         mainBuffer.write('var ${globalObject}$_=${_}');
  -      if(compiler.deferredLoadTask.isProgramSplit) {
  +      if(isProgramSplit) {
           mainBuffer.add('${globalsHolder}.$globalObject$_=${_}');
         }
         mainBuffer.write('new dart$N');
       }
   
       mainBuffer.add('function ${namer.isolateName}()$_{}\n');
  -    if (compiler.deferredLoadTask.isProgramSplit) {
  +    if (isProgramSplit) {
         mainBuffer
           .write('${globalsHolder}.${namer.isolateName}$_=$_'
                  '${namer.isolateName}$N'
  
positive.code:     task.computeNeededConstants();
      emitCompileTimeConstants(mainBuffer, mainOutputUnit);
  
      if (compiler.deferredLoadTask.isProgramSplit) {
        /// Map from OutputUnit to a hash of its content. The hash uniquely
        /// identifies the code of the output-unit. It does not include
        /// boilerplate JS code, like the sourcemap directives or the hash
  
negative.code:     mainBuffer.add(buildGeneratedBy());
      addComment(HOOKS_API_USAGE, mainBuffer);
  
      if (isProgramSplit) {
        /// For deferred loading we communicate the initializers via this global
        /// variable. The deferred hunks will add their initialization to this.
        /// The semicolon is important in minified mode, without it the
        /// following parenthesis looks like a call to the object literal.
        mainBuffer..add(
            'self.${deferredInitializers} = self.${deferredInitializers} || '
            'Object.create(null);$n');
      }
  
      // Using a named function here produces easier to read stack traces in
      // Chrome/V8.
      mainBuffer.add('(function(${namer.currentIsolate})$_{\n');
      if (isProgramSplit) {
        /// We collect all the global state of the, so it can be passed to the
        /// initializer of deferred files.
        mainBuffer.add('var ${globalsHolder}$_=${_}Object.create(null)$N');
  