code: function getSuperCallInConstructor(constructor) {
              var links = getNodeLinks(constructor);
              // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
              if (links.hasSuperCall === undefined) {
                  links.superCall = findFirstSuperCall(constructor.body);
                  links.hasSuperCall = links.superCall ? true : false;
              }
              return links.superCall;
          }
docs: Return a cached result if super-statement is already found.
  Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
  
  @param constructor constructor-function to look for super statement