Binboo.Jira.Commands.LabelCommand.RetrieveLabelList C# (CSharp) Method

        private ICommandResult RetrieveLabelList(IEnumerable<string> issueKeys)
        {
            var labels = new HashSet<string>();
            return ExecuteCommand(
                        issueKeys,

                        issueKey =>
                        {
                            var issue = _jira.GetIssue(issueKey);
                            Array.ForEach(LabelFormatConveter.From(issue).To(a => a.ToArray()), label => labels.Add(label));

                            return FormatOutputMessage(issueKey, LabelFormatConveter.FromIssue(issue));
                        },

                        () => labels);
        }