Method put

packages/melonjs/src/utils/array-multimap.js:9–16

(key, value)

		this._map = new Map();
	}
	put(key, value) {
		const arr = this._map.get(key);
		if (arr) {
			arr.push(value);
		} else {
			this._map.set(key, [value]);
		}
	}
	get(key) {
		return this._map.get(key) || [];
	}