def METHOD_NAME(connection_name: Optional[pulumi.Input[str]] = None,
                                                    network_virtual_appliance_name: Optional[pulumi.Input[str]] = None,
                                                    resource_group_name: Optional[pulumi.Input[str]] = None,
                                                    opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetNetworkVirtualApplianceConnectionResult]:
    """
    Retrieves the details of specified NVA connection.
    :param str connection_name: The name of the NVA connection.
    :param str network_virtual_appliance_name: The name of the Network Virtual Appliance.
    :param str resource_group_name: The name of the resource group.
    """
    ...