code: public static Matcher unwrap(final Matcher matcher)
      {
          if (matcher instanceof ProxyMatcher) {
              final ProxyMatcher proxyMatcher = (ProxyMatcher) matcher;
              if (proxyMatcher.dirty)
                  proxyMatcher.apply();
              return proxyMatcher.target == null ? proxyMatcher
                  : proxyMatcher.target;
          }
          return matcher;
      }
docs: Retrieves the innermost Matcher that is not a ProxyMatcher.
  
  @param matcher the matcher to unwrap
  @return the given instance if it is not a ProxyMatcher, otherwise the innermost non-proxy Matcher