def METHOD_NAME(resource_group_name: Optional[pulumi.Input[str]] = None,
                                    server_name: Optional[pulumi.Input[str]] = None,
                                    virtual_network_rule_name: Optional[pulumi.Input[str]] = None,
                                    opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetVirtualNetworkRuleResult]:
    """
    Gets a virtual network rule.
    :param str resource_group_name: The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
    :param str server_name: The name of the server.
    :param str virtual_network_rule_name: The name of the virtual network rule.
    """
    ...