/**
 * @param {string|Array<string>} fonts Mapbox GL Style fontstack or single font, e.g. `['Open Sans Regular', 'Arial Unicode MS Regular']` or `'Open Sans Regular'`.
 * @param {number} size Font size in pixels.
 * @param {string|number} [lineHeight] Line height as css line-height.
 * @returns {string} CSS font definition, e.g. `'normal 400 16px/1.2 "Open Sans"'`.
 */
export default function _default(fonts: string | Array<string>, size: number, lineHeight?: string | number): string;
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