Method append_nulls

arrow-array/src/builder/struct_builder.rs:234–236

(&mut self, n: usize)

    /// Appends `n` `null`s into the builder.
    #[inline]
    pub fn append_nulls(&mut self, n: usize) {
        self.null_buffer_builder.append_n_nulls(n);
    }

    /// Builds the `StructArray` and reset this builder.
    pub fn finish(&mut self) -> StructArray {