Hi all, I am wondering if we need to consider the case of an empty buffer for ArrayData validity buffer. What happens when we create an ArrayData structure with buffers[0] = empty_buffer and null_count= -1? Shouldn't this infer null_count as 0 from this method? https://github.com/apache/arrow/blob/6c3547347e9d95f7d0c77d5949cb8fcf6983ca9b/cpp/src/arrow/array/data.cc#L50
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