Function hasOwn

packages/shared/src/editmode.ts:240–242

(value: Record<string, unknown>, key: string)

}

function hasOwn(value: Record<string, unknown>, key: string): boolean {
  return Object.prototype.hasOwnProperty.call(value, key);
}

function optionalNumber(value: Record<string, unknown>, key: string): number | null | undefined {
  if (!hasOwn(value, key)) return undefined;