ArrowCountMode

enum Arrow.CountMode

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They correspond to the values of arrow::compute::CountOptions::CountMode.

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Name	Description
`GARROW_COUNT_MODE_ONLY_VALID`	Only non-null values will be counted.
`GARROW_COUNT_MODE_ONLY_NULL`	Only null values will be counted.
`GARROW_COUNT_MODE_ALL`	All will be counted.