vector/src/main/java/org/apache/arrow/vector/complex/ListVector.java [348:402]:
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    reallocValidityBuffer();
  }

  private void reallocValidityBuffer() {
    final int currentBufferCapacity = checkedCastToInt(validityBuffer.capacity());
    long newAllocationSize = getNewAllocationSize(currentBufferCapacity);

    final ArrowBuf newBuf = allocator.buffer(newAllocationSize);
    newBuf.setBytes(0, validityBuffer, 0, currentBufferCapacity);
    newBuf.setZero(currentBufferCapacity, newBuf.capacity() - currentBufferCapacity);
    validityBuffer.getReferenceManager().release(1);
    validityBuffer = newBuf;
    validityAllocationSizeInBytes = (int) newAllocationSize;
  }

  private long getNewAllocationSize(int currentBufferCapacity) {
    long newAllocationSize = currentBufferCapacity * 2L;
    if (newAllocationSize == 0) {
      if (validityAllocationSizeInBytes > 0) {
        newAllocationSize = validityAllocationSizeInBytes;
      } else {
        newAllocationSize = getValidityBufferSizeFromCount(INITIAL_VALUE_ALLOCATION) * 2L;
      }
    }
    newAllocationSize = CommonUtil.nextPowerOfTwo(newAllocationSize);
    assert newAllocationSize >= 1;

    if (newAllocationSize > MAX_ALLOCATION_SIZE) {
      throw new OversizedAllocationException("Unable to expand the buffer");
    }
    return newAllocationSize;
  }

  /**
   * Same as {@link #copyFrom(int, int, ValueVector)} except that it handles the case when the
   * capacity of the vector needs to be expanded before copy.
   *
   * @param inIndex position to copy from in source vector
   * @param outIndex position to copy to in this vector
   * @param from source vector
   */
  @Override
  public void copyFromSafe(int inIndex, int outIndex, ValueVector from) {
    copyFrom(inIndex, outIndex, from);
  }

  /**
   * Copy a cell value from a particular index in source vector to a particular position in this
   * vector.
   *
   * @param inIndex position to copy from in source vector
   * @param outIndex position to copy to in this vector
   * @param from source vector
   */
  @Override
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vector/src/main/java/org/apache/arrow/vector/complex/ListViewVector.java [304:342]:
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    reallocValidityBuffer();
  }

  private void reallocValidityBuffer() {
    final int currentBufferCapacity = checkedCastToInt(validityBuffer.capacity());
    long newAllocationSize = getNewAllocationSize(currentBufferCapacity);

    final ArrowBuf newBuf = allocator.buffer(newAllocationSize);
    newBuf.setBytes(0, validityBuffer, 0, currentBufferCapacity);
    newBuf.setZero(currentBufferCapacity, newBuf.capacity() - currentBufferCapacity);
    validityBuffer.getReferenceManager().release(1);
    validityBuffer = newBuf;
    validityAllocationSizeInBytes = (int) newAllocationSize;
  }

  private long getNewAllocationSize(int currentBufferCapacity) {
    long newAllocationSize = currentBufferCapacity * 2L;
    if (newAllocationSize == 0) {
      if (validityAllocationSizeInBytes > 0) {
        newAllocationSize = validityAllocationSizeInBytes;
      } else {
        newAllocationSize = getValidityBufferSizeFromCount(INITIAL_VALUE_ALLOCATION) * 2L;
      }
    }
    newAllocationSize = CommonUtil.nextPowerOfTwo(newAllocationSize);
    assert newAllocationSize >= 1;

    if (newAllocationSize > MAX_ALLOCATION_SIZE) {
      throw new OversizedAllocationException("Unable to expand the buffer");
    }
    return newAllocationSize;
  }

  @Override
  public void copyFromSafe(int inIndex, int outIndex, ValueVector from) {
    copyFrom(inIndex, outIndex, from);
  }

  @Override
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