Grid/Column/Column.php
public function isVisible($isExported = false)
    {
        $visible = $isExported && $this->export !== null ? $this->export : $this->visible;

        if ($visible && $this->authorizationChecker !== null && $this->getRole() !== null) {
            return $this->authorizationChecker->isGranted($this->getRole());
        }

        return $visible;
    }
public function isVisible($isExported = false)
    {
        $visible = $isExported && $this->export !== null ? $this->export : $this->visible;

        if ($visible && $this->authorizationChecker !== null && $this->getRole() !== null) {
            return $this->authorizationChecker->isGranted($this->getRole());
        }

        return $visible;
    }
Return column visibility.

@return bool return true when column is visible