Builds a map from an arbitrary number of (String, A) pairs for any A that can be
turned into a value
Builds a map from a scala.collection.Map of values
Builds a map from an arbitrary number of (String, DynamoValue) pairs
Builds a map from a Java Map of attribute values
The empty map
Builds a map from an iterable collection of (String, DynamoValue) pairs
Builds a singleton map