code: public static  Matcher unwrap(Matcher matcher) {
          if (matcher instanceof VarFramingMatcher) {
              VarFramingMatcher varFramingMatcher = (VarFramingMatcher) matcher;
              return unwrap(varFramingMatcher.inner);
          }
          return matcher;
      }
docs: Retrieves the innermost Matcher that is not a VarFramingMatcher.
  
  @param matcher the matcher to unwrap
  @return the given instance if it is not a VarFramingMatcher, otherwise the innermost Matcher