6cc383b10a
Add NonNullFields to packages. Add missing Nullable annotations. Extend Javadoc. Replace simple equals/hashCode methods using Lomboks EqualsAndHashCode annotation. Use RequiredArgsConstructor for private classes in favor of own constructors. Replace null-checks with qualified access whether objects are empty/applicable. Rearrange methods according to interface ordering. Remove demo code from KeyspaceConfiguration. Original pull request: #277.