docs: function animateToHeight( jqElement, newHeight ) {
                 currentTargetHeight = newHeight;
                 startWatchingForContentResizing();
                 if( newHeight > 0 ) {
                    jqElement.css( 'display', 'block' );
                    jqElement.animate( { 'height': `${newHeight}px` }, () => {
                       jqElement.css( 'height', 'auto' );
                       stopWatchingForContentResizing();
                    } );
                 }
                 else {
                    jqElement.animate( { 'height': 0 }, () => {
                       if( !showContent ) {
                          jqElement.css( 'display', 'none' );
                       }
                    } );
                 }
              }