code: public boolean containsNamespace(String ns)
      {
          for (int i = 0; i < this.libraries.length; i++)
          {
              if (this.libraries[i].containsNamespace(ns))
              {
                  return true;
              }
          }
          return false;
      }
docs: /*
  (non-Javadoc)
  
  @see org.apache.myfaces.view.facelets.tag.TagLibrary#containsNamespace(java.lang.String)