code: public static InputStream getFirstAvailableStream(Collection<String> names) {
  		ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(IOUtils.class.getClassLoader());
  		for (String name : names) {
  			try {
  				InputStream stream = getInputStreamWithResolver(resolver, name);
  				if (stream != null) {
  					return stream;
  				}
  			}
  			catch (MustacheIOException ex) {
  				// Go to the next test
  			}
  		}
  
  		throw new MustacheIOException("Unable to locate one of: " + names);
  	}
docs: Return an input stream from given names.
  First result returning a valid stream is returned.
  Names are searched into the classpath.
  Names can contains ant style pattern.
  
  @param names Names collection.
  @return Input Stream.
  @throws MustacheIOException If everything fail.