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 This interface encapsulates an arbitrary header block to be used
 by the soap serialization or protocol.  See the description of the
 nsISOAPBlock interface for information on how the basics of this
 interface works.
[scriptable, uuid(063d4a4e-1dd2-11b2-a365-cbaf1651f140)]
interface nsISOAPHeaderBlock : nsISOAPBlock

Attributes

 The actor URI of the header block.  If element is set,
   then this is a computed value.  If this is modified,
   then element  is set to null and all attributes computed 
   from element revert to previous uncomputed values.
attribute AString actorURI 
 Flags that the processor must understand this header.
   If element is set, then this is a computed value.
   If this is modified, then element is set to null and 
   all attributes computed from element revert to
   previous uncomputed values.
attribute boolean mustUnderstand