public EntityTypeImpl buildEntityType(VertexElement vertex, EntityType type) {
        return getOrBuildConcept(vertex, (v) -> EntityTypeImpl.create(v, type));
    }
public EntityTypeImpl buildEntityType ( VertexElement vertex , EntityType type ) { return getOrBuildConcept ( vertex , ( v ) -> EntityTypeImpl . create ( v , type ) ) ; }
----------------------------------------- Building Entity Types  ------------------------------------------------