@type t() :: %Milvex.Milvus.Proto.Milvus.AlterCollectionFieldRequest{
  __unknown_fields__: [Protobuf.unknown_field()],
  base: Milvex.Milvus.Proto.Common.MsgBase.t() | nil,
  collection_name: String.t(),
  db_name: String.t(),
  delete_keys: [String.t()],
  field_name: String.t(),
  properties: [Milvex.Milvus.Proto.Common.KeyValuePair.t()]
}