toWKT method
Converts the MultiPoint to a WKT String.
Example:
MultiPoint([Coordinate(1, 2), Coordinate(3, 4)]).toWKT(); // MULTIPOINT(1 2, 3 4)
Implementation
@override
String toWKT() {
return 'MULTIPOINT(${coordinates.map((c) => c.toWKT()).join(',')})';
}