code: protected VertexElement addTypeVertex(LabelId id, Label label, Schema.BaseType baseType) {
          VertexElement vertexElement = addVertexElement(baseType);
          vertexElement.property(Schema.VertexProperty.SCHEMA_LABEL, label.getValue());
          vertexElement.property(Schema.VertexProperty.LABEL_ID, id.getValue());
          return vertexElement;
      }
docs: Adds a new type vertex which occupies a grakn id. This result in the grakn id count on the meta concept to be
  incremented.
  
  @param label    The label of the new type vertex
  @param baseType The base type of the new type
  @return The new type vertex