ed objects controlled by the MEJB. This method
 enables any of the following to be obtained: The names of all managed objects,
 the names of a set of managed objects specified by pattern matching on the
 <CODE>ObjectName</CODE>, a specific managed object name (equivalent to
 testing whether a managed object is registered). When the object name is
 null or no domain and key properties are specified, all objects are selected.
 It returns the set of Jakarta EE ObjectNames for the managed objects selected.</div