arg_name:optionname:readConcerntype::php:`MongoDB\\Driver\\ReadConcern <class.mongodb-driver-readconcern>`description:|:manual:`Read concern </reference/read-concern>` to use for the operation.Defaults to the client's read concern.This is not supported for server versions prior to 3.2 and will result in anexception at execution time if used.interface:phpmethodoperation:~optional:true---arg_name:optionname:readPreferencetype::php:`MongoDB\\Driver\\ReadPreference <class.mongodb-driver-readpreference>`description:|:manual:`Read preference </reference/read-preference>` to use for theoperation. Defaults to the client's read preference.interface:phpmethodoperation:~optional:true---source:file:apiargs-common-option.yamlref:typeMap---arg_name:optionname:writeConcerntype::php:`MongoDB\\Driver\\WriteConcern <class.mongodb-driver-writeconcern>`description:|:manual:`Write concern </reference/write-concern>` to use for the operation.Defaults to the client's write concern.interface:phpmethodoperation:~optional:true...