Optionalposition: ICoordinatesOptionaloverrideOptions: RecursivePartial<IParticlesOptions>Optionalgroup: stringOptionalinitializer: (particle: Particle) => booleanOptionalposition: ICoordinatesOptionaloverrideOptions: RecursivePartial<IParticlesOptions>Optionalgroup: stringOptionalgroup: stringOptionaloverride: booleanOptionalquantity: numberOptionalgroup: stringOptionaloverride: booleanOptionalgroup: string