Method filter

src/utils/collection.util.ts:258–261

(predicate: Predicate)

    constructor(private collection: any) {}

    public filter(predicate: Predicate): this {
        this.collection = filter(this.collection, predicate);
        return this;
    }

    public groupBy(iteratee: Iteratee): this {
        this.collection = groupBy(this.collection, iteratee);