WriteConcern.fromMap constructor
Implementation
WriteConcern.fromMap(Map<String, Object> writeConcernMap)
: w = writeConcernMap[keyW],
wtimeout = writeConcernMap[keyWtimeout] as int?,
fsync = writeConcernMap[keyFsync] as bool? ?? false,
j = writeConcernMap[keyJ] as bool? ?? false,
provenance = writeConcernMap[keyProvenance] as String?;