code: function wrap(file, isCircularDependency) {
    const header =
      `/*== ${file.relpath} ==*/\n` +
      `$m['${file.id}'] = ${isCircularDependency ? "function () {\n$m['" + file.id + "'] = " : ''}{ exports: {} };`;
    const footer = `${isCircularDependency ? '};\n' : ''}/*≠≠ ${file.relpath} ≠≠*/`;
  
    return [header, footer];
  }
docs: Wrap 'file' contents
  @param {File} file
  @param {Boolean} isCircularDependency
  @returns {Array}