code: function getDependencySize(dependencyDump) {
          var attr = dependencyDump.attributes[SIZE_ATTRIBUTE_NAME];
          if (attr === undefined)
            return 0;
          shouldDefineSize = true;
          return attr.value;
        }
docs: This helper function returns the numeric value of the size attribute of the given dependent memory allocator dump. If the attribute is defined, the shouldDefineSize flag above is also set to true (because condition (2) or (3) is satisfied). Otherwise, zero is returned (and the flag is left unchanged).