code: private boolean isDebugVisible(Value v)
  	{
  		return v instanceof ReferenceValue || v instanceof NumericValue
  				|| v instanceof CharacterValue || v instanceof BooleanValue
  				|| v instanceof SetValue || v instanceof SeqValue
  				|| v instanceof MapValue || v instanceof TokenValue
  				|| v instanceof RecordValue || v instanceof ObjectValue
  				|| v instanceof NilValue || v instanceof FunctionValue;
  	}
docs: Determines if a value should be shown in the debug client
  
  @param v
  The value to check
  @return True if the value is allowed to be displayed in the client