function Op(properties) {
        this.actions = [];
        if (properties)
            for (let keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                if (properties[keys[i]] != null)
                    this[keys[i]] = properties[keys[i]];
    }
Constructs a new Op.
@exports Op
@classdesc Represents an Op.
@implements IOp
@constructor
@param {IOp=} [properties] Properties to set