Method append_nulls

arrow-array/src/builder/map_builder.rs:185–191

(&mut self, n: usize)

    /// Returns an error if the key and values builders are in an inconsistent state.
    #[inline]
    pub fn append_nulls(&mut self, n: usize) -> Result<(), ArrowError> {
        self.validate_equal_lengths()?;
        let offset = self.key_builder.len() as i32;
        self.offsets_builder.extend(std::iter::repeat_n(offset, n));
        self.null_buffer_builder.append_n_nulls(n);
        Ok(())
    }

    /// Builds the [`MapArray`]
    pub fn finish(&mut self) -> MapArray {