IDEA-9 (IU - 90.94) - still can't do basic refactoring in Groovy

It appears that the Introduce Variable refactoring works correctly for Groovy classes in IDEA-9 Ultimate (beta), but the Introduce Field and Introduce Constant refactorings don't.

Is this intentional or is JetBrains planning to make these refactorings available before the final release of 9.0?