public interface Locatable
java.net.URL getURL()
URL that identifies this
  Locatable.  Parts of the IDE will use the value of
  this URL as a hash key for caching UI components for this
  Locatable.  Therefore, URL uniqueness is
  important.URL identifying this Locatable.void setURL(java.net.URL url)
URL associated with this Locatable.
  It is important that the URL only be changed when the
  Locatable has just been created or when all caches
  keyed on the previous URL can also be updated.url - The URL to set.