docs: private LabelId getNextId() {
          TypeImpl<?, ?> metaConcept = (TypeImpl<?, ?>) getMetaConcept();
          Integer currentValue = metaConcept.vertex().property(Schema.VertexProperty.CURRENT_LABEL_ID);
          if (currentValue == null) {
              currentValue = Schema.MetaSchema.values().length + 1;
          } else {
              currentValue = currentValue + 1;
          }
          //Vertex is used directly here to bypass meta type mutation check
          metaConcept.property(Schema.VertexProperty.CURRENT_LABEL_ID, currentValue);
          return LabelId.of(currentValue);
      }