joinDelimiter function
Joins a list of names into a single string using the specified delimiter.
Defaults to dotDelimiter if no delimiter is provided.
Example: joinDelimiter(['foo', 'bar']) returns "foo.bar".
Example: joinDelimiter(['foo', 'bar'], '-') returns "foo-bar".
Implementation
String joinDelimiter(List<String> names, [String delimiter = dotDelimiter]) =>
names.join(delimiter);