Interface XRGestureEvent

interface XRGestureEvent {
    buttons:
        | "Y"
        | "X"
        | "B"
        | "A"
        | "RightTrigger"
        | "RightPinch"
        | "LeftTrigger"
        | "LeftPinch"
        | "LeftAxesLeft"
        | "LeftAxesRight"
        | "LeftAxesUp"
        | "LeftAxesDown"
        | "RightAxesLeft"
        | "RightAxesRight"
        | "RightAxesUp"
        | "RightAxesDown";
    controllers: { raycaster: { leftRay: Raycaster; rightRay: Raycaster } };
    defaultPrevented: boolean;
    isFinal: boolean;
    isFirst: boolean;
    machineType: "Pico" | "Oculus";
    session: XRSession;
    timeStamp: number;
    type: string;
    preventDefault(): void;
}