name="editAsUseDefault"
                                            value="<la:message key="labels.design_use_default_button" />">
                                        <i class="fa fa-recycle" aria-hidden="true"></i>
                                        <la:message key="labels.design_use_default_button"/>
                                    </button>
                                </div>

  }

  fun idleConnectionCount(): Int =
    connections.count {
      it.withLock { it.calls.isEmpty() }
    }

  fun connectionCount(): Int = connections.size

  /**
   * Attempts to acquire a recycled connection to [address] for [call]. Returns the connection if it
   * was acquired, or null if no connection was acquired. The acquired connection will also be