FormUrlMapName
Specifies key and value node names used to encode a Map structure. See https://awslabs.github.io/smithy/1.0/spec/aws/aws-query-protocol.html#maps
This trait need only be added to a SdkFieldDescriptor if the map entry, key, or value is something other than the default specified in FormUrlMapName.Default
Parameters
key
the name of the key field
value
the name of the value field