/** Check if the character represented by a given [Unicode code point](https://en.wikipedia.org/wiki/Code_point) is [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms). @param codePoint - The [code point](https://en.wikipedia.org/wiki/Code_point) of a character. @example ``` import isFullwidthCodePoint from 'is-fullwidth-code-point'; isFullwidthCodePoint('谢'.codePointAt(0)); //=> true isFullwidthCodePoint('a'.codePointAt(0)); //=> false ``` */ export default function isFullwidthCodePoint(codePoint: number): boolean;