MongoCursor.this - multiple declarations

this(Q, S) (
  MongoClient client,
  string collection,
  QueryFlags flags,
  int nskip,
  int nret,
  Q query,
  S return_field_selector
);

this (
  MongoClient client,
  string collection,
  long cursor,
  DocType[] existing_documents
);

this(Q) (
  MongoClient client,
  string database,
  string collection,
  Q query,
  FindOptions options
);

this (
  MongoClient client,
  Bson command,
  int batchSize = 0,
  Duration getMoreMaxTime = Duration.max
);