code: @SuppressWarnings("unused")
      public SwipeActionAdapter setNormalSwipeFraction(float normalSwipeFraction) {
          if(normalSwipeFraction < 0 || normalSwipeFraction > 1) {
              throw new IllegalArgumentException("Must be a float between 0 and 1");
          }
          this.mNormalSwipeFraction = normalSwipeFraction;
          if(mListView != null) mTouchListener.setNormalSwipeFraction(normalSwipeFraction);
          return this;
      }
docs: Set the fraction of the View Width that needs to be swiped before it is counted as a normal swipe
  
  @param normalSwipeFraction float between 0 and 1