Interface EmitRateOptions

interface EmitRateOptions {
    shape: EmitRateShape;
    peakRate: number;
    startRate?: number;
    easing?:
        | EasingFn
        | "linear"
        | "easeInQuad"
        | "easeOutQuad"
        | "easeInOutQuad"
        | "easeInCubic"
        | "easeOutCubic"
        | "easeInOutCubic"
        | "easeInQuart"
        | "easeOutQuart"
        | "easeInOutQuart"
        | "easeInSine"
        | "easeOutSine"
        | "easeInOutSine"
        | "easeInBack"
        | "easeOutBack"
        | "easeInOutBack"
        | "easeInElastic"
        | "easeOutElastic"
        | "easeInOutElastic"
        | "easeOutBounce"
        | "easeInBounce"
        | "easeInOutBounce";
    sustainFraction?: number;
}