private static String createErrorMessage(final Class<?> expectedType, final Object id) {
            return String.format("Expected an id that is convertible to %s but received %s - [%s]", expectedType, id.getClass(), id);
        }
Manages identifiers of type {@code String}.
tinkergraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/tinkergraph/structure/AbstractTinkerGraph.java