Definition
/**
* Create a GRANT role builder.
*
* Example: grant_role('admin')->to('user1')
* Produces: GRANT admin TO user1
*
* Example: grant_role('admin', 'developer')->to('user1')->withAdminOption()
* Produces: GRANT admin, developer TO user1 WITH ADMIN OPTION
*
* @param string ...$roles The roles to grant
*
* @return GrantRoleToStep Builder for grant role options
*/
grant_role(string $roles) : GrantRoleToStep