code: private File getJVMLibrary( String fileName )
      {
          File libFile = new File( getJavaLibDir(), fileName );
          if ( !libFile.exists() )
          {
              libFile = new File( getAltJavaLibDir(), fileName );
              if ( !libFile.exists() )
              {
                  libFile = null;
              }
          }
          return libFile;
      }
docs: Finds a library file in either the primary or alternate lib directory.
  @param fileName The base name of the file.
  @return Either a canonical filename, or {@code null} if not found.