code: public static Map<String,ExportedVariable> getExportedVariables( AbstractBlockHolder holder ) {
  
  		Map<String,ExportedVariable> result = new HashMap<> ();
  		for( BlockProperty p : holder.findPropertiesBlockByName( ParsingConstants.PROPERTY_GRAPH_EXPORTS )) {
  			result.putAll( findExportedVariables( p.getValue(), p.getFile(), p.getLine()));
  		}
  
  		return result;
  	}
docs: Gets and splits exported variables separated by a comma.
  <p>
  Variable names are not prefixed by the type's name.<br />
  Variable values may also be surrounded by quotes.
  </p>
  
  @param holder a property holder (not null)
  @return a non-null map (key = exported variable name, value = the exported variable)