{ 'TransitGateway': { 'TransitGatewayId': 'string', 'TransitGatewayArn': 'string', 'State': 'pending'|'available'|'modifying'|'deleting'|'deleted', 'OwnerId': 'string', 'Description': 'string', 'CreationTime': datetime(2015, 1, 1), 'Options': { 'AmazonSideAsn': 123, 'TransitGatewayCidrBlocks': [ 'string', ], 'AutoAcceptSharedAttachments': 'enable'|'disable', 'DefaultRouteTableAssociation': 'enable'|'disable', 'AssociationDefaultRouteTableId': 'string', 'DefaultRouteTablePropagation': 'enable'|'disable', 'PropagationDefaultRouteTableId': 'string', 'VpnEcmpSupport': 'enable'|'disable', 'DnsSupport': 'enable'|'disable', 'SecurityGroupReferencingSupport': 'enable'|'disable', 'MulticastSupport': 'enable'|'disable' }, 'Tags': [ { 'Key': 'string', 'Value': 'string' }, ] }} 
