# fromMap method Null safety

TutorialEntryEntity? fromMap(

1. Object? o,
2. {Map<String, String>? newDocumentIds}

)

## Implementation

    static TutorialEntryEntity? fromMap(Object? o,
        {Map<String, String>? newDocumentIds}) {
      if (o == null) return null;
      var map = o as Map<String, dynamic>;

      var imageIdNewDocmentId = map['imageId'];
      if ((newDocumentIds != null) && (imageIdNewDocmentId != null)) {
        var imageIdOldDocmentId = imageIdNewDocmentId;
        imageIdNewDocmentId = newRandomKey();
        newDocumentIds[imageIdOldDocmentId] = imageIdNewDocmentId;
      }
      return TutorialEntryEntity(
        description: map['description'],
        imageId: imageIdNewDocmentId,
        code: map['code'],
      );
    }