code: function setUnfixed() {
              // Only unfix the target element and the spacer if we need to.
              if (!isUnfixed()) {
                  lastOffsetLeft = -1;
  
                  // Hide the spacer now that the target element will fill the
                  // space.
                  spacer.css('display', 'none');
  
                  // Remove the style attributes that were added to the target.
                  // This will reverse the target back to the its original style.
                  target.css({
                      'z-index' : originalZIndex,
                      'width' : '',
                      'position' : originalPosition,
                      'left' : '',
                      'top' : originalOffsetTop,
                      'margin-left' : ''
                  });
  
                  target.removeClass('scroll-to-fixed-fixed');
  
                  if (base.options.className) {
                      target.removeClass(base.options.className);
                  }
  
                  position = null;
              }
          }
docs: Sets the target element back to unfixed. Also, hides the spacer.