# CloudFormationCostEstimationResourceCollectionFilter
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Information about an AWS CloudFormation stack used to create a monthly cost estimate for DevOps Guru to analyze AWS resources. The maximum number of stacks you can specify for a cost estimate is one. The estimate created is for the cost to analyze the AWS resources defined by the stack. For more information, see [Stacks](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/stacks.html) in the * AWS CloudFormation User Guide*.

## Contents
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 ** StackNames **   <a name="DevOpsGuru-Type-CloudFormationCostEstimationResourceCollectionFilter-StackNames"></a>
An array of CloudFormation stack names. Its size is fixed at 1 item.  
Type: Array of strings  
Array Members: Fixed number of 1 item.  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `^[a-zA-Z*]+[a-zA-Z0-9-]*$`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/devops-guru-2020-12-01/CloudFormationCostEstimationResourceCollectionFilter) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/devops-guru-2020-12-01/CloudFormationCostEstimationResourceCollectionFilter) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/devops-guru-2020-12-01/CloudFormationCostEstimationResourceCollectionFilter)