fromJson static method
Factory method: parse a JSON representation into a concrete DataType.
Looks up the correct subclass in _dataTypes.
Implementation
static BoolDataType fromJson(Map<String, dynamic> data) {
if (data['type'] != 'bool') {
throw Exception("Expected type 'bool', got '${data['type']}'");
}
return BoolDataType(nullable: data["nullable"], metadata: data["metadata"]);
}