public StrJoiner merge(StrJoiner strJoiner){
		if(null != strJoiner && null != strJoiner.appendable){
			final String otherStr = strJoiner.toString();
			if(strJoiner.wrapElement){
				this.append(otherStr);
			}else{
				this.append(otherStr, this.prefix.length(), otherStr.length());
			}
		}
		return this;
	}
@Test
	public void mergeTest(){
		StrJoiner joiner1 = StrJoiner.of(",", "[", "]");
		joiner1.append("123");
		StrJoiner joiner2 = StrJoiner.of(",", "[", "]");
		joiner1.append("456");
		joiner1.append("789");

		final StrJoiner merge = joiner1.merge(joiner2);
		assertEquals("[123,456,789]", merge.toString());
	}