Returns a list of your Lambda functions. For each function, the response includes the function configuration information. You must use GetFunction to retrieve the code for your function.
This operation requires permission for the lambda:ListFunctions action.
If you are using versioning feature, the response returns list of $LATEST versions of your functions. For information about the versioning feature, see AWS Lambda Function Versioning and Aliases (http://docs.aws.amazon.com/lambda/latest/dg/versioning-aliases.html).