Function IsNull

cpp/src/arrow/array/data.h:211–211

\brief Return the null-ness of a given array element Calling `IsNull(i)` is the same as `!IsValid(i)`.

  ///
  /// Calling `IsNull(i)` is the same as `!IsValid(i)`.
  bool IsNull(int64_t i) const { return !IsValid(i); }

  /// \brief Return the validity of a given array element
  ///