Render the signature of a function or method
namespace Facebook\HHAPIDoc\PageSections; final class FunctionishSignature extends PageSection {...}
->getMarkdown(): ?string
Facebook\HHAPIDoc\PageSections\PageSection
->__construct(\Facebook\HHAPIDoc\DocumentationBuilderContext $context, \Facebook\HHAPIDoc\Documentable $documentable, ?\Facebook\HHAPIDoc\DocBlock\DocBlock $docBlock)