| Bindable | Interface that can be implemented by classes that provide an IBinder. |
| Converter<I, O> | Converts input to output. |
| EspressoRemoteMessage | Transforms an Espresso remote message from and to a proto message. |
| EspressoRemoteMessage.From<T, M> | Transforms a proto message of type M into a class of type T. |
| EspressoRemoteMessage.To<M> | Transforms a class implementing this interface to a proto message. |
| RemoteInteraction | Facilitates communication between other Espresso instance that may be running in different processes. |
| ConstructorInvocation | Reflectively invokes the constructor of a declared class. |
| EspressoRemote | A singleton class that facilitates communication between other Espresso instance that may be running in different processes. |
| FieldDescriptor | Provides additional meta data about a Field declared in a class. |
| GenericRemoteMessage | Generic implementation of the EspressoRemoteMessage interface, which uses reflection for
proto message serialization and deserialization. |
| InteractionRequest | Encapsulates an ERROR(/InteractionRequestProto) request. |
| InteractionRequest.Builder | Creates an instance of InteractionRequest from a View matcher and action. |
| InteractionResponse | Encapsulates a ERROR(/InteractionResultProto) request. |
| InteractionResponse.Builder | Builder for InteractionResponse |
| InteractionResponse.RemoteError | TODO(b/31122396): parse this from a proto Enum representing wire protocol error codes and their default description. |
| NoopRemoteInteraction | Noop RemoteInteraction object |
| ProtoUtils | Contains various utility methods to ease use of protos and increased readability in code. |
| RemoteDescriptor | Descriptor object containing all the required information to serialize and deserialize a type to and from a proto. |
| RemoteDescriptor.Builder | Builder for RemoteDescriptor |
| RemoteDescriptorRegistry | A registry for registering remote descriptors. |
| RemoteInteractionRegistry | An exposed registry instance to make it easy for callers to get a hold of Remote Interaction |
| TypeProtoConverters | Converters from ERROR(/Any) proto messages to their unwrapped target types. |
| InteractionResponse.Status | The status of this interaction response. |
| NoRemoteEspressoInstanceException | An Exception which indicates that there are no remote Espresso clients present. |
| RemoteEspressoException | Espresso exception representing any runtime related errors in a multi-process environment |
| RemoteProtocolException | Espresso exception representing any protocol related errors in a multi-process environment |