vector/src/main/java/org/apache/arrow/vector/VarCharVector.java [212:225]:
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  public void set(int index, NullableVarCharHolder holder) {
    assert index >= 0;
    fillHoles(index);
    BitVectorHelper.setValidityBit(validityBuffer, index, holder.isSet);
    final int startOffset = getStartOffset(index);
    if (holder.isSet != 0) {
      final int dataLength = holder.end - holder.start;
      offsetBuffer.setInt((index + 1) * ((long) OFFSET_WIDTH), startOffset + dataLength);
      valueBuffer.setBytes(startOffset, holder.buffer, holder.start, dataLength);
    } else {
      offsetBuffer.setInt((index + 1) * ((long) OFFSET_WIDTH), startOffset);
    }
    lastSet = index;
  }
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vector/src/main/java/org/apache/arrow/vector/VarBinaryVector.java [210:223]:
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  public void set(int index, NullableVarBinaryHolder holder) {
    assert index >= 0;
    fillHoles(index);
    BitVectorHelper.setValidityBit(validityBuffer, index, holder.isSet);
    final int startOffset = getStartOffset(index);
    if (holder.isSet != 0) {
      final int dataLength = holder.end - holder.start;
      offsetBuffer.setInt((index + 1) * ((long) OFFSET_WIDTH), startOffset + dataLength);
      valueBuffer.setBytes(startOffset, holder.buffer, holder.start, dataLength);
    } else {
      offsetBuffer.setInt((index + 1) * ((long) OFFSET_WIDTH), startOffset);
    }
    lastSet = index;
  }
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