An annotation that marks a 
boolean or 
Boolean attribute
 of a modeled class which should be serialized as a DynamoDB BOOL. For
 backwards compatibility with old versions of the 
DynamoDBMapper,
 by default booleans are serialized using the DynamoDB N type, with a value
 of '1' representing 'true' and a value of '0' representing 'false'.
 
 Using this annotation on the field definition or getter method definition
 for the attribute will cause it to be serialized as DynamoDB-native BOOL
 type. Old versions of the 
DynamoDBMapper which do not know about the
 BOOL type will be unable to read items containing BOOLs, so don't use me
 unless all readers of your table are using an updated version of the mapper.