code: private Map<TemplateType, JSType> evaluateTypeTransformations(
        ImmutableList<TemplateType> templateTypes,
        Map<TemplateType, JSType> inferredTypes,
        FlowScope scope) {
  
      Map<String, JSType> typeVars = null;
      Map<TemplateType, JSType> result = null;
      TypeTransformation ttlObj = null;
  
      for (TemplateType type : templateTypes) {
        if (type.isTypeTransformation()) {
          // Lazy initialization when the first type transformation is found
          if (ttlObj == null) {
            ttlObj = new TypeTransformation(compiler, scope.getDeclarationScope());
            typeVars = buildTypeVariables(inferredTypes);
            result = new LinkedHashMap<>();
          }
          // Evaluate the type transformation expression using the current
          // known types for the template type variables
          JSType transformedType = ttlObj.eval(
              type.getTypeTransformation(),
              ImmutableMap.copyOf(typeVars));
          result.put(type, transformedType);
          // Add the transformed type to the type variables
          typeVars.put(type.getReferenceName(), transformedType);
        }
      }
      return result;
    }
docs: This function will evaluate the type transformations associated to the template types