function findElementByNode(prefix, node)
   {
      var selector = '.' + formatClassName(prefix, node);
      return graph.select(selector);
   }
function findElementByNode(prefix, node)
   {
      var selector = '.' + formatClassName(prefix, node);
      return graph.select(selector);
   }
function findElementByNode ( prefix , node ) { var selector = '.' + formatClassName ( prefix , node ) ; return graph . select ( selector ) ; }
A helper to select a given SVG element from given node data.

@param {string}   prefix - String prefix.
@param {object}   node - Node object
A helper to select a given SVG element from given node data .