Opendalmodule Operator : sig ... endtype operator = Opendal_core.Operator.operatortype reader = Opendal_core.Operator.readertype writer = Opendal_core.Operator.writertype lister = Opendal_core.Operator.listertype metadata = Opendal_core.Operator.metadatatype entry = Opendal_core.Operator.entrytype operator_info = Opendal_core.Operator.operator_infotype capability = Opendal_core.Operator.capability