src/main/java/com/conveyal/gtfs/validator/Validator.java
public void registerError(Entity entity, NewGTFSErrorType errorType) {
        errorStorage.storeError(NewGTFSError.forEntity(entity, errorType));
    }
public void registerError(Entity entity, NewGTFSErrorType errorType) {
        errorStorage.storeError(NewGTFSError.forEntity(entity, errorType));
    }
Store an error that affects a single line of a single table. Wraps the underlying error factory method.