/// The total number of NULL values in the column.
The total number of NULL values in the column.
The total number of NULL values in the column .
pub fn null_count(&self) -> u32 {
        match self {
            Self::F64(enc, _) => enc.null_count(),
        }
    }
pub fn null_count ( & self ) -> u32 { match self { Self :: F64 ( enc , _ ) => enc . null_count ( ) , } }
The total number of NULL values in the column.
The total number of NULL values in the column .
&self