src/org/kocakosm/pitaya/util/Joiner.java
public Joiner withPrefix(String prefix)
	{
		return new Joiner(separator, prefix, suffix,
			trim, ignoreNull, ignoreEmpty, forNull, forEmpty);
	}
public Joiner withPrefix(String prefix)
	{
		return new Joiner(separator, prefix, suffix,
			trim, ignoreNull, ignoreEmpty, forNull, forEmpty);
	}
Returns a new {@code Joiner} that will behave as this one except that
it will use the specified prefix when joining {@code String}s.

@param prefix the prefix.

@return a new {@code Joiner} with the desired configuration.

@throws NullPointerException if {@code prefix} is {@code null}.