Interface b2WorldDef

interface b2WorldDef {
    contactDampingRatio: number;
    contactHertz: number;
    enableContinuous: boolean;
    enableSleep: boolean;
    gravity: b2Vec2;
    hitEventThreshold: number;
    internalValue: number;
    maximumLinearSpeed: number;
    restitutionThreshold: number;
    workerCount: number;
    clone(): this;
    delete(): void;
    deleteLater(): this;
    isAliasOf(other: ClassHandle): boolean;
    isDeleted(): boolean;
    [key: number]: () => void;
}