Determines whether the current user has write access to this component. Global administrative privileges are
respected by this method and will always cause the result to be true. This method checks the effective ACL
restrictions only; even if this method returns true the method will still not be writable if it is part of a read
only package; see the isReadOnly() method for that.
This method is used to return a links target component. Therefore it will be checked if the component is a link
and if it is part of an infinite loop created by linked links.
The component itself if it was not a link. Otherwise the linked component or null if thelink is part of an infinite loop.
Returns whether this component is part of a read-only package. If this is the case, the component can never be
modified, not even with global administrative privileges. This will always return true if the server has been
globally set to read only mode, for instance if used in a cluster environment.