Access the arguments as an array.
@param includeCommand By default only the parameter arguments are
returned unless (includeCommand === true), in which case the list is
prepended with commandAssignment.arg
function(includeCommand) {
        var args = [];
        if (includeCommand === true) {
            args.push(this.commandAssignment);
        }
        Object.keys(this._assignments).forEach(function(name) {
            args.push(this.getAssignment(name));
        }, this);
        return args;
    }