code: public static CompilerOptions getDefaultOptions() {
  		final String sourceMethod = "getDefaultOptions"; //$NON-NLS-1$
  		final boolean isTraceLogging = log.isLoggable(Level.FINER);
  		if (isTraceLogging) {
  			log.entering(sourceClass, sourceMethod);
  		}
  		CompilerOptions options = new CompilerOptions();
  		options.setLanguageIn(LanguageMode.ECMASCRIPT5);
  		if (isTraceLogging) {
  			log.exiting(sourceMethod, sourceMethod, options);
  		}
  		return options;
  	}
docs: Returns a {@link CompilerOptions} with default settings used by the Aggregator
  
  @return a new object with default settings