/**
 * Create an extension to support frontmatter (YAML, TOML, and more).
 *
 * @param {Options} [options='yaml'] One preset or matter, or an array of them.
 * @returns {Extension}
 */
export function frontmatter(
  options?: import('../matters.js').Options | undefined
): Extension
export type Extension = import('micromark-util-types').Extension
export type ConstructRecord = import('micromark-util-types').ConstructRecord
export type Construct = import('micromark-util-types').Construct
export type Tokenizer = import('micromark-util-types').Tokenizer
export type State = import('micromark-util-types').State
export type Options = import('../matters.js').Options
export type Matter = import('../matters.js').Matter
export type Info = import('../matters.js').Info
