public DynamicThrottlePolicy setWindowSizeIncrement(double windowSizeIncrement) {
        this.windowSizeIncrement = windowSizeIncrement;
        this.windowSize = Math.max(this.minWindowSize, this.windowSizeIncrement);
        return this;
    }
Sets the step size used when increasing window size.

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