def begin_create_or_update(resource_group_name, gateway_name, connection_name, vpn_connection_parameters, custom_headers:nil)
      response = begin_create_or_update_async(resource_group_name, gateway_name, connection_name, vpn_connection_parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def begin_create_or_update(resource_group_name, gateway_name, connection_name, vpn_connection_parameters, custom_headers:nil)
      response = begin_create_or_update_async(resource_group_name, gateway_name, connection_name, vpn_connection_parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Creates a vpn connection to a scalable vpn gateway if it doesn't exist else
 updates the existing connection.

 @param resource_group_name [String] The resource group name of the
 VpnGateway.
 @param gateway_name [String] The name of the gateway.
 @param connection_name [String] The name of the connection.
 @param vpn_connection_parameters [VpnConnection] Parameters supplied to
 create or Update a VPN Connection.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [VpnConnection] operation results.