presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/SphericalGeographyType.java/SphericalGeographyType/SphericalGeographyType
class SphericalGeographyType:    private SphericalGeographyType()
    {
        super(new TypeSignature(SPHERICAL_GEOGRAPHY_TYPE_NAME), Slice.class);
    }