in src/uriparameters/RequestParameterCodegenBuilder.hack [49:61]
final public static function getUriSpec(
UriParameter $param,
): classname<UriParameterCodegenSpec> {
$spec = self::getRequestSpec($param);
invariant(
\is_subclass_of($spec, UriParameterCodegenSpec::class),
'Expected %s to be a %s',
$spec,
UriParameterCodegenSpec::class,
);
/* HH_FIXME[4110] can't coerce classnames */
return $spec;
}