code: function (index, blocks, out) {
          // only called in case of error, i.e not digested by _elementOrComponent
          var block = blocks[index], path = this._getComponentPathAsString(block.ref) ;
          this._logError("End component </#" + path + "> does not match any <#" + path + "> component", block);
          return index;
      }
docs: Captures isolated end components to raise an error.
  @param {Array} blocks the full list of blocks.
  @param {Integer} index the index of the block to manage.
  @param {Array} out the output as an array of Node.
  @return {Integer} the index of the block where the function stopped or -1 if all blocks have been handled.