SparseValues
Denotes that a Map or List may contain null values Details at https://awslabs.github.io/smithy/1.0/spec/core/type-refinement-traits.html#sparse-trait
Denotes that a Map or List may contain null values Details at https://awslabs.github.io/smithy/1.0/spec/core/type-refinement-traits.html#sparse-trait