/**
    Remove undefined fields from an object
    @param {object} obj The object to filter
    @param {Object.<string, any>} [comparisonObj={}] An object that, for any key, if the key is not present on that object, the key will be filtered out. Note, this ignores the value on that object
    @returns {object}
*/
export default function filterObject(obj: object, comparisonObj?: {
    [x: string]: any;
}): object;