private static void replaceWithQualifier(@NotNull PsiVariable qualifier, @NotNull PsiMethodCallExpression oldExpression) {
    String qualifierPresentableText = qualifier.getName();
    PsiElementFactory elementFactory = JavaPsiFacade.getElementFactory(qualifier.getProject());
    PsiMethodCallExpression expression = (PsiMethodCallExpression)elementFactory
      .createExpressionFromText(qualifierPresentableText + "." + oldExpression.getMethodExpression().getReferenceName() + "()", null);
    oldExpression.getMethodExpression().replace(expression.getMethodExpression());
  }
private static void replaceWithQualifier(@NotNull PsiVariable qualifier, @NotNull PsiMethodCallExpression oldExpression)