Method finish

arrow-buffer/src/builder/null.rs:210–213

Builds the [`NullBuffer`] and resets the builder. Returns `None` if the builder only contains `true`s. Use [`Self::build`] when you don't need to reuse this builder.

(&mut self)

    /// Returns `None` if the builder only contains `true`s. Use [`Self::build`]
    /// when you don't need to reuse this builder.
    pub fn finish(&mut self) -> Option<NullBuffer> {
        self.len = 0;
        Some(NullBuffer::new(self.bitmap_builder.take()?.build()))
    }

    /// Builds the [`NullBuffer`] without resetting the builder.
    ///