proc accept(self: memoryConnManager; address: string): MemoryListener {.
    ...raises: [MemoryTransportError], tags: [], forbids: [].}

proc accept(self: MemoryListener): Future[Connection] {....gcsafe,
    raises: [CatchableError], tags: [], forbids: [].}

proc close(self: MemoryListener) {....raises: [], tags: [RootEffect], forbids: [].}

proc dial(self: memoryConnManager; address: string): MemoryListener {.
    ...raises: [MemoryTransportError], tags: [], forbids: [].}

proc dial(self: MemoryListener): Future[Connection] {....gcsafe,
    raises: [CatchableError], tags: [TimeEffect, RootEffect], forbids: [].}

proc getInstance(): memoryConnManager {....gcsafe, raises: [], tags: [],
                                        forbids: [].}