Dart APIunself_licenseLicenseDatalicenses licenses property Null safety List<LicenseEntry> licenses final Implementation final List<LicenseEntry> licenses = <LicenseEntry>[]; unself_license unself_license LicenseData licenses property LicenseData class Constructors LicenseData Properties firstPackage hashCode licenses packageLicenseBindings packages runtimeType Methods addLicense noSuchMethod sortPackages toString Operators operator ==