geopackage-sdk/src/main/java/mil/nga/geopackage/factory/GeoPackageManagerImpl.java
@Override
    public Set<String> externalDatabaseSet() {
        Set<String> databases = new HashSet<String>();
        addExternalDatabases(databases);
        return databases;
    }
@Override
    public Set<String> externalDatabaseSet() {
        Set<String> databases = new HashSet<String>();
        addExternalDatabases(databases);
        return databases;
    }
{@inheritDoc}