@NotNull
    private LightPsiClassBuilder createBuilderClass(@NotNull final PsiAnnotation annotation,
                                                    PsiVariable @NotNull [] setters,
                                                    @Nullable PsiType builtType) {
      final LightPsiClassBuilder builderClass = new BuilderHelperLightPsiClass(
        myContainingClass, getBuilderClassName(annotation, myContainingClass)
      );

      for (PsiVariable field : setters) {
        LightMethodBuilder setter = createFieldSetter(builderClass, field, annotation, myContext);
        builderClass.addMethod(setter);
      }

      final LightMethodBuilder buildMethod = createBuildMethod(
        annotation, builtType == null ? createType(myContainingClass) : builtType
      );
      return builderClass.addMethod(buildMethod);
    }
@NotNull
    private LightPsiClassBuilder createBuilderClass(@NotNull final PsiAnnotation annotation,
                                                    PsiVariable @NotNull [] setters,
                                                    @Nullable PsiType builtType)