def METHOD_NAME(self, embeddings):
    new = embeddings.shape[0]
    # Append new ids - position in embeddings + existing offset is used as the id
    self.backend.add_with_ids(embeddings, np.arange(self.config["offset"], self.config["offset"] + new, dtype=np.int64))
    # Update id offset and index metadata
    self.config["offset"] += new
    self.metadata()