Function isFilter

packages/filter/src/query.ts:254–264

(
  candidate: any,
)

 * @param candidate
 */
export function isFilter<MT extends object>(
  candidate: any,
): candidate is Filter<MT> {
  if (typeof candidate !== 'object') return false;
  for (const key in candidate) {
    if (!filterFields.includes(key)) {
      return false;
    }
  }
  return true;
}

/**
 * A builder for Where object. It provides fluent APIs to add clauses such as