Here is a list of all documented variables with links to the class documentation for each member:

AMQP_FRAME_TYPE : Apache.Qpid.Proton.Engine.Implementation.ProtonFrameDecodingHandler, Apache.Qpid.Proton.Engine.Implementation.ProtonFrameEncodingHandler
AMQP_HEADER_ENVELOPE : Apache.Qpid.Proton.Engine.HeaderEnvelope
DEFAULT_MAX_POOL_SIZE : Apache.Qpid.Proton.Engine.AmqpPerformativeEnvelopePool< T >
DEFAULT_MAX_SASL_FRAME_SIZE : Apache.Qpid.Proton.Engine.Implementation.Sasl.ProtonEngineSaslDriver
DEFAULT_PENDING_WRITES_BUFFER_SIZE : Apache.Qpid.Proton.Client.StreamSenderOptions
DEFAULT_READ_BUFFER_SIZE : Apache.Qpid.Proton.Client.StreamReceiverOptions
DEFAULT_SASL_ENABLED : Apache.Qpid.Proton.Client.SaslOptions
DEFAULT_SESSION_INCOMING_CAPACITY : Apache.Qpid.Proton.Client.SessionOptions
DEFAULT_SESSION_OUTGOING_CAPACITY : Apache.Qpid.Proton.Client.SessionOptions
DefaultCapacity : Apache.Qpid.Proton.Buffer.ProtonByteBuffer
DefaultMaximumCapacity : Apache.Qpid.Proton.Buffer.ProtonByteBuffer
entryPool : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >
FRAME_SIZE_BYTES : Apache.Qpid.Proton.Engine.Implementation.ProtonFrameDecodingHandler
HANDLER_ALL_EVENTS : Apache.Qpid.Proton.Engine.Implementation.ProtonEngineHandlerContext
HANDLER_READS : Apache.Qpid.Proton.Engine.Implementation.ProtonEngineHandlerContext
HANDLER_WRITES : Apache.Qpid.Proton.Engine.Implementation.ProtonEngineHandlerContext
keySet : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >
MIN_BUFFER_SIZE_LIMIT : Apache.Qpid.Proton.Client.StreamSenderOptions
modCount : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >
root : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >
SASL_FRAME_TYPE : Apache.Qpid.Proton.Engine.Implementation.ProtonFrameDecodingHandler, Apache.Qpid.Proton.Engine.Implementation.ProtonFrameEncodingHandler
SASL_HEADER_ENVELOPE : Apache.Qpid.Proton.Engine.HeaderEnvelope
size : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >
values : Apache.Qpid.Proton.Utilities.SplayedDictionary< K, V >