code: function(file, ast) {
          var content = recast.print(ast, {
              wrapColumn: Number.Infinity
          }).code;
  
          content = this._updateSourceMap(file, content);
  
          fs.writeFileSync(file, content);
      }
docs: Saves file with the reprinted AST and updated source map, if any.
  
  @method _saveFile
  @protected
  @param {String} file The file to save
  @param {Object} ast The AST of the file