https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-properties-quicksight-analysis-funnelchartfieldwells.html
AWS::QuickSight::Analysis FunnelChartFieldWells - AWS CloudFormation
This is a union type structure. For this structure to be valid, only one of the attributes can be defined.
awsquicksightanalysiscloudformation