This plugin knows how to build protypes with typeids
beginning with "NSN/". Actually, it only understands
NSNs in the range of 100-199, which (for our purposes)
are all Widgets, which are of the class PhysicalAsset.
This method is called by ldm.getPrototype() methods
after first checking the cache. If the right thing
is not found in the cache, the ldm calls prototype providers
in order until one returns an asset.
Fields inherited from org.cougaar.planning.plugin.legacy.PluginAdapter