int () { int result = groupId != null ? groupId.hashCode() : 0; result = 31 * result + (artifactId != null ? artifactId.hashCode() : 0); result = 31 * result + (version != null ? version.hashCode() : 0); result = 31 * result + (packaging != null ? packaging.hashCode() : 0); result = 31 * result + (description != null ? description.hashCode() : 0); return result; }