le="class or interface in java.lang">NullPointerException</a></code> - if context is <code>null</code>, or if this map does not permit <code>null</code> keys
 or values, and the specified key or value is <code>null</code>.</dd>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if some aspect of this key or value prevents it from being stored in this map.</dd>
<dd