in src/HackBuilder.hack [492:504]
public function addInlineCommentWithStars(?string $comment): this {
if ($comment === null) {
return $this;
}
// Max length of each line of the docblock. Subtract 6 to compensate
// for the initial and trailing "/* " and " */"
$max_length = $this->getMaxCodeLength() - 6;
$lines = $this->splitString($comment, $max_length);
foreach ($lines as $line) {
$this->addLine('/* '.\rtrim($line).' */');
}
return $this;
}