/**
 * Generic для определения опциональности параметра.
 * @example
 * ```typescript
 * type ExampleFunction = (requiredParam: string, optionalParam?: string) => void;
 *
 * type IsFirstParamOptional = IsOptionalParam<Parameters<ExampleFunction>[0]>; // false
 * type IsSecondParamOptional = IsOptionalParam<Parameters<ExampleFunction>[1]>; // true
 * ```
 */
export type IsOptionalParam<T> = undefined extends T ? true : false;
/**
 * Generic для определения опциональных ключей объекта.
 * @example
 * ```typescript
 * type ExampleObject = { id: string; page?: number };
 * type OptionalKeys = OptionalKeys<ExampleObject>; // 'page'
 * ```
 */
export type OptionalKeys<TObject extends Record<string, unknown>> = keyof {
    [TKey in keyof TObject as undefined extends TObject[TKey] ? TKey : never]: TObject[TKey];
};