presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/GeoFunctions.java/GeoFunctions/stEnvelopeAsPts
class GeoFunctions:    @SqlNullable
    @Description("Returns the lower left and upper right corners of bounding rectangular polygon of a Geometry")
    @ScalarFunction("ST_EnvelopeAsPts")
    @SqlType("array(" + GEOMETRY_TYPE_NAME + ")")
    public static Block stEnvelopeAsPts(@SqlType(GEOMETRY_TYPE_NAME) Slice input)
    {
        Envelope envelope = deserializeEnvelope(input);
        if (envelope == null) {
            return null;
        }
        BlockBuilder blockBuilder = GEOMETRY.createBlockBuilder(null, 2);
        Point lowerLeftCorner = new Point(envelope.getXMin(), envelope.getYMin());
        Point upperRightCorner = new Point(envelope.getXMax(), envelope.getYMax());
        GEOMETRY.writeSlice(blockBuilder, serialize(createFromEsriGeometry(lowerLeftCorner, null, false)));
        GEOMETRY.writeSlice(blockBuilder, serialize(createFromEsriGeometry(upperRightCorner, null, false)));
        return blockBuilder.build();
    }