cContext = function(oWalker, oSourceElement) {
           /**
            * @return {!TSyntacticCodeUnit} A function that is able to
            *     initiate the traversal from a given source element.
            */
           var fLambda = function() {
             return oWalker.walk(oSourceElement);
           };

           return fLambda;
         }
Initiates the traversal of a source element.
@param {!TWalker} oWalker An instance of an object that allows the
    traversal of an abstract syntax tree.
@param {!TSyntacticCodeUnit} oSourceElement A source element from
    which the traversal should commence.
@return {function(): !TSyntacticCodeUnit} A function that is able to
    initiate the traversal from a given source element.