public void setEventMarginVertical(int eventMarginVertical) {
        this.mEventMarginVertical = eventMarginVertical;
        invalidate();
    }
Set the top and bottom margin of the event. The event will release this margin from the top
and bottom edge. This margin is useful for differentiation consecutive events.
@param eventMarginVertical The top and bottom margin.
library/src/main/java/com/alamkanak/weekview/WeekView.java