code: protected Member getPropertyAccessor(String propertyName) {
  		if (readAccessors.containsKey(propertyName)) {
  			return (Member) readAccessors.get(propertyName);
  		}
  		else {
  			return (Member) writeAccessors.get(propertyName);
  		}
  	}
docs: Return any accessor, be it read or write, for the given property.
  
  @param propertyName name of the property.
  @return an accessor for the property or <code>null</code>