library/src/main/java/com/github/clans/fab/FloatingActionMenu.java
public void setAnimated(boolean animated) {
        mIsAnimated = animated;
        mOpenAnimatorSet.setDuration(animated ? ANIMATION_DURATION : 0);
        mCloseAnimatorSet.setDuration(animated ? ANIMATION_DURATION : 0);
    }
public void setAnimated(boolean animated) {
        mIsAnimated = animated;
        mOpenAnimatorSet.setDuration(animated ? ANIMATION_DURATION : 0);
        mCloseAnimatorSet.setDuration(animated ? ANIMATION_DURATION : 0);
    }
Sets whether open and close actions should be animated

@param animated if <b>false</b> - menu items will appear/disappear instantly without any animation