attr1.put( "a", "b", "c" );
assertFalse( attr1.remove( "b", "e" ) );
assertEquals( 2, attr1.size() );
attr1.clear();
attr1.put( "a", (String)null, "b" );
assertTrue( attr1.remove( (String )null, "a" ) );
assertEquals( 1, attr1.size() );
EntryAttribute attr2 = new DefaultClientAttribute( "test" );