HH\Set::__toString
Returns the string version of the current Set, which is "Set"
public function __toString(): string;
Returns
string- Thestring"Set".
Examples
The string version of a Set is always "Set":
$s = Set {1, 2, 3};
echo $s->__toString()."\n";
$s2 = Set {'a', 'b', 'c'};
echo $s2->__toString()."\n";
$s3 = Set {};
echo $s3->__toString()."\n";