public bool DeleteDocument(string key, Guid?etag, out JObject metadata)
{
var docPos = Mutator.Documents.FindValue(key);
metadata = null;
if (docPos == null)
{
return(false);
}
var existingEtag = EnsureValidEtag(docPos.Value, etag);
Mutator.DecrementDocumentCount();
Reader.Position = docPos.Value;
ConsumeKeyFromFile();
metadata = JObject.Load(new BsonReader(Reader));
var docId = metadata.Value <int>("@docId");
Mutator.DocumentsById.Remove(docId);
Mutator.DocumentsByEtag.Remove(new Guid(existingEtag).ToByteArray());
Mutator.Documents.Remove(key);
return(true);
}