How to use the @hpcc-js/util.find function in @hpcc-js/util

private _resolve(defs: Definition[] = [], qualifiedID: string): Definition | undefined {
        const qualifiedIDParts = qualifiedID.split(".");
        const base = qualifiedIDParts.shift();
        const retVal = find(defs, def => {
            if (typeof def.name === "string" && typeof base === "string" && def.name.toLowerCase() === base.toLowerCase()) {
                return true;
            }
            return false;
        });
        if (retVal && retVal.definitions.length && qualifiedIDParts.length) {
            return this._resolve(retVal.definitions, qualifiedIDParts.join("."));
        }
        return retVal;
    }