class Environment { final String sourceCodeUrl; final String issuesReportUrl; final String contactEmail; const Environment({ required this.sourceCodeUrl, required this.issuesReportUrl, required this.contactEmail, }); const Environment.dev() : sourceCodeUrl = 'https://github.com/vodemn/m3_lightmeter', issuesReportUrl = 'https://github.com/vodemn/m3_lightmeter/issues', contactEmail = 'contact.vodemn@gmail.com'; const Environment.prod() : sourceCodeUrl = 'https://github.com/vodemn/m3_lightmeter', issuesReportUrl = 'https://github.com/vodemn/m3_lightmeter/issues', contactEmail = 'contact.vodemn@gmail.com'; }