| CancelState | Tracks the cancelation state of a cancelable operation. |
| DateFormatter | Allows the formatting of a date according to predefined formats. |
| NamedLink | An optionally-named link relating to an entity. |
| Operation<T, E extends Throwable> | Interface for operations carried out by services on behalf of plugins |
| Page<T> | Provides support for pagination. |
| PagedCallback | Marker interface augmenting a callback which produces a Page of results during its processing. |
| PageRequest | Pagination for a request. |
| Progress | A representation of the current progress of a task |
| ProgressReporter | A reporter for the current status of a task. |
| UncheckedOperation<T> | Convenience version of Operation that does not define a checked exception on its interface. |
| AbstractPagedSummary | Extends AbstractSummary and adds additional properties for summarizing a page of output. |
| AbstractPagedSummary.AbstractPagedBuilder<B extends AbstractPagedBuilder<B, S extends AbstractPagedSummary>, S> | |
| AbstractSummary | A base class for building summary objects that can be provided to callbacks when operations complete. |
| AbstractSummary.AbstractBuilder<B extends AbstractBuilder<B, S extends AbstractSummary>, S> | |
| BuilderSupport | |
| CustomPreconditions | More precondition checks following the same pattern as Guava's Preconditions. |
| FilteredPageImpl<T> | An instance of Page that supports pagination across an underlying paged collection. |
| MoreCollectors | Additional utility methods missing from Collectors. |
| MoreStreams | Additional utilities for creating Stream streams. |
| PageImpl<T> | |
| PageRequestImpl | Default implementation of PageRequest. |
| ProgressImpl | A default immutable implementation of the Progress interface. |
| SimpleNamedLink | A simple implementation of the NamedLink interface. |
| Version | Version represents a version. |
| DateFormatter.FormatType | A predefined date format. |
| Order | Specifies the direction a list of results should be ordered - ascending or descending order. |