FileTrees withAst(@NotNull Supplier<? extends FileElement> ast) throws StubTreeLoader.StubTreeAndIndexUnmatchCoarseException {
    return new FileTrees(myFile, myStub, ast, myRefToPsi).reconcilePsi(derefStub(), ast.get(), true);
  }
FileTrees withAst(@NotNull Supplier<? extends FileElement> ast)