You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: heap.rs
    path of file: ./repos/OxidSQL/src/access
    
    the code of the file until where you have to start completion: use std::borrow::BorrowMut;
use std::marker::PhantomData;
use std::sync::Arc;
use std::sync::atomic::AtomicU64;

use aes::cipher::BlockEncrypt;
use aes::cipher::KeyInit;
use aes::cipher::generic_array::GenericArray;
use bitvec::bitvec;
use bitvec::vec::BitVec;

use crate::catalog::AttributeStatistics;
use crate::catalog::Catalog;
use crate::catalog::TableDesc;
use crate::statistics::sampling::ReservoirSampler;
use crate::storage::buffer_manager::BufferManager;
use crate::types::RelationTID;
use crate::types::TupleValue;
use crate::types::TupleValueType;

use super::ScanFunction;
use super::SlottedPageScan;
use super::SlottedPageSegment;
use super::tuple::MutatingTupleParser;
use super::tuple::Tup
    
    fn insert_tuples(&self, tuples: &mut [Tuple]) -> Result<Box<[RelationTID]>, B::BError> {
        let mut skip = self.reservoir_sampler.get_skip();
        let result = self.storage.insert_tuples(tuples)?;
        // Add to HyperLogLog sketches
        
        for tuple in tuples.iter() {
            for (i, value) in tuple.values.iter().enumerate() {
                if let Some(value) = value {
                    let hash = HASHER.hash_one(value);
                    self.attribute_statistics[i].counting_hyperloglog.add(hash);
                }
            }
        }
        // Add to sample
        for (tuple, tid) in tuples.iter_mut().zip(result.iter()) {
            match skip.next() {
                Some(true) => {
                    let mut sample_tuple = tuple.clone();
                    sample_tuple.values.insert(0, Some(TupleValue::BigInt(u64::from(tid) as i64)));
                    sample_tuple.values.insert(0, Some(TupleValue::BigInt(skip.skip_index as i64)));
                    let index = if (skip.skip_index as usize) < self.sample_size {
                        skip.skip_index
                    } else {
                        self.crng.counter_rng(skip.skip_index) % self.sample_size as u32
                    };
                    sample_tuple.values.insert(0, Some(TupleValue::BigInt(index as i64)));
                    let mut attributes = bitvec![0; self.sample_storage.attributes.len()];
                    attributes.set(0, true);
                    let mut res = self.sample_storage.scan(attributes, |t| {
                        t.values[0] == Some(TupleValue::BigInt(index as i64))
                    })?;
                    if let Some(r) = res.next() {
                        self.sample_storage.update_tuple(r?.0, sample_tuple)?;
                    } else {
                        self.sample_storage.insert_tuples(&mut [sample_tuple])?;
                    }
                    tuple.flags |= 1;
                    skip = skip.get_new();
                }
                None => {
                    skip = skip.get_new();
                }
                _ => {}
            }
        }
        self.cardinality.fetch_add(result.len() as u64, atomic::Ordering::Relaxed);
        Ok(result)
    }