Phan\AST\UnionTypeVisitor::visitConst PHP Method

    public function visitConst(Node $node) : UnionType
    {
        if ($node->children['name']->kind == \ast\AST_NAME) {
            if (defined($node->children['name']->children['name'])) {
                return Type::fromObject(constant($node->children['name']->children['name']))->asUnionType();
            } else {
                // Figure out the name of the constant if its
                // a string.
                $constant_name = isset($node->children['name']->children['name']) ? $node->children['name']->children['name'] : '';
                // If the constant is referring to the current
                // class, return that as a type
                if (Type::isSelfTypeString($constant_name)) {
                    return $this->visitClassNode($node);
                }
                $constant = (new ContextNode($this->code_base, $this->context, $node))->getConst();
                return $constant->getUnionType();
            }
        }
        return new UnionType();
    }