public DynamicThrottlePolicy setWindowSizeDecrementFactor(double decrementFactor) {
        this.decrementFactor = decrementFactor;
        return this;
    }
Sets the relative step size when decreasing window size.

@param decrementFactor the step size to set
@return this, to allow chaining
messagebus/src/main/java/com/yahoo/messagebus/DynamicThrottlePolicy.java