@NotNull
    private static ThreeState isFirstIterationThen(@NotNull PsiStatement statement) {
      PsiIfStatement ifStatement = tryCast(statement, PsiIfStatement.class);
      if (ifStatement == null) return ThreeState.UNSURE;
      PsiExpression condition = ifStatement.getCondition();
      if (condition == null) return ThreeState.UNSURE;

      boolean negated = BoolUtils.isNegation(condition);
      condition = PsiUtil.skipParenthesizedExprDown(condition);
      PsiExpression expression = negated ? BoolUtils.getNegated(condition) : condition;
      PsiLocalVariable boolFlagVar = resolveLocalVariable(expression);
      if(boolFlagVar == null) return ThreeState.UNSURE;
      return ThreeState.fromBoolean(ExpressionUtils.isLiteral(PsiUtil.skipParenthesizedExprDown(boolFlagVar.getInitializer()), !negated));
    }
@NotNull
    private static ThreeState isFirstIterationThen(@NotNull PsiStatement statement)