public IAcceptWord Concat(IConcat automat) => JoinConcatUnion(automat, JoinConcatUnionKind.Concat);
public IAcceptWord Concat(IConcat cfg) => Combine(cfg, new string[] { "{0}{1}" }, "concat");
public IAcceptWord Concat(IConcat automat) => JoinConcatUnion(automat, JoinConcatUnionKind.Concat);
public IAcceptWord Concat(IConcat cfg) => Combine(cfg, new string[] { "{0}{1}" }, "concat");