public static @Nullable PsiLocalVariable getDeclaredVariable(PsiStatement statement) {
    if (!(statement instanceof PsiDeclarationStatement declaration)) return null;
    PsiElement[] elements = declaration.getDeclaredElements();
    if (elements.length != 1) return null;
    return ObjectUtils.tryCast(elements[0], PsiLocalVariable.class);
  }
public static @Nullable PsiLocalVariable getDeclaredVariable(PsiStatement statement)