code: protected String getMatcherString(MatchType matchType, String paramName) {
      String matchB;
      if (matchType == MatchType.DECOMPOSE || matchType == MatchType.ANY) {
        matchB = "any()";
      } else {
        matchB = "eq(" + paramName + ".t)";
      }
      return matchB;
    }
docs: Returns the matcher string {@code any() or eq(x)} for a given type.