code: private Ref functionArgDeclaration() throws PageException {
  	Ref ref = impOp();
  	if (cfml.forwardIfCurrent(':') || cfml.forwardIfCurrent('=')) {
  	    cfml.removeSpace();
  	    ref = new LFunctionValue(ref, assignOp());
  	}
  	return ref;
      }
docs: Liest einen gelableten Funktionsparamter ein <br />
  EBNF:<br />
  <code>assignOp [":" spaces assignOp];</code>
  
  @return CFXD Element
  @throws PageException