public void unsetPermission(String name){
  permissions.remove(name.toLowerCase(java.util.Locale.ENGLISH));
  permissible.recalculatePermissions();
}

public void unsetPermission ( String name ) { permissions . remove ( name . toLowerCase ( java . util . Locale . ENGLISH ) ) ; permissible . recalculatePermissions ( ) ; }
removes the specified permission from this attachment . < p > if the permission does not exist in this attachment , nothing will happen .
