code: private void buildExplicitlyNamedList() {
  
          // each plugin must either be in included set or must be a dependent of
          // included set
  
          for (GrailsPlugin plugin : originalPlugins) {
          // find explicitly included plugins
              String name = plugin.getName();
              if (suppliedNames.contains(name)) {
                  explicitlyNamedPlugins.add(plugin);
                  addedNames.add(name);
              }
          }
      }
docs: Returns the sublist of the supplied set who are explicitly named, either
  as included or excluded plugins
  
  @return a sublist containing the elements of the original list
  corresponding with the explicitlyNamed items as passed into the
  constructor