function parseImports(content, filePath, options) {

            var oldLines = content.toString('utf8').split('\n');
            var newLines = [];
            var importKeyword = 'import';
            var importRawKeyword = 'import-raw';
            var regex = new RegExp("^(\\s+|)(\\w+):\\s(!(" + importKeyword + "|" + importRawKeyword + ")\\s+?(.*)(\\.ya?ml|\\.json)?)?\\s*$");
            var space = '';

            for (var i = 0; i < oldLines.length; i++) {
                var line = oldLines[i];
                var match = line.match(regex);
                if (!match) {
                    newLines.push(space + line);
                } else {
                    var fileName = match[3].substr(match[3].lastIndexOf('/')+1);
                    var fileNameArray = fileName.split('.');
                    newLines.push(line.replace(match[3], '"[!' + fileNameArray[0] + '!]"'));
                }
            }

            return new Buffer(newLines.join('\n'));
        }

        gulp
            .src([
                './configuration/*.yml'
            ])
            .pipe(yaml({
                parseContents: parseImports
            }))

             ' is empty. YAML loader cannot load empty content'));
         return callback();
       }
+      if (options.parseContents) {
+        file.contents = options.parseContents(file.contents, file.path, options);
+      }
       try {
         file.contents = yaml2json(file.contents, options);
         file.path = gutil.replaceExtension(file.path, '.json');