// @flow
import type {
  CSSFontFaceRule,
  RuleOptions,
  JssStyle,
  ToCssOptions,
  // eslint doesn't understand usage with types
  // eslint-disable-next-line no-unused-vars
  BaseRule
} from '../flow-types'

declare export class FontFaceRule implements BaseRule {
  type: string;
  at: string;
  key: string;
  style: JssStyle;
  options: RuleOptions;
  isProcessed: boolean;
  renderable: ?CSSFontFaceRule;
  constructor(key: string, style: JssStyle, options: RuleOptions): this;
  toString(options?: ToCssOptions): string;
}

declare export default {
  onCreateRule(key: string, style: JssStyle, options: RuleOptions): FontFaceRule | null
}