nd the
 values are primitive data types in the Java programming language. The names must have a value that is not null, and
 not an empty string. The entries can be accessed sequentially or randomly by name. The order of the entries is
 undefined. <code>MapMessage</code> inherits from the <code>Message</code> interface and adds a message body that contains a
 Map.

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 The primitive types can be read or written explicitly using methods for each type. They may also be read or written
 generically as object