public void Seal()
{
if (builder == null)
{
return;
}
builder.Close();
VPackSlice slice = builder.Slice();
for (int i = 0; i < slice.Length; i++)
{
VPackSlice key = slice.KeyAt(i);
VPackSlice value = slice.ValueAt(i);
attributeToKey[key.ToStringUnchecked()] = value;
keyToAttribute[value.ToInt32().Value] = key;
}
}