nl_tokens: Helper function that scrolls the view towards a view - sequence node .
pl_tokens: function _ensureVisibleSequence ( viewSequence , next ) { this . _scroll . scrollToSequence = undefined ; this . _scroll . scrollToRenderNode = undefined ; this . _scroll . ensureVisibleRenderNode = viewSequence . get ( ) ; this . _scroll . scrollToDirection = <mask> ; this . _scroll . scrollDirty = true ; }