docs: function groc(file, enc, callback) {
  
  		/*jshint validthis:true*/
  
  		// Do nothing if no contents
  		if (file.isNull()) {
  			this.push(file);
  			return callback();
  		}
  
  		if (file.isStream()) {
  			this.emit("error",
  				new gutil.PluginError("gulp-groc", "Stream content is not supported"));
  			return callback();
  		}
  
  		// check if file.contents is a `Buffer`
  		if (file.isBuffer()) {
              filesToGroc.push(file.path);
              this.push(file);
              callback();
  		}
  
  	}