code: public static void assertTrueOrInvalidPropertyName(boolean expression, SQLProperty item1, SQLProperty item2) {
  		if (!expression) {
  			String msg = String.format("Properties '%s#%s' and '%s#%s' must have same column name",
  					item1.getParent().name, item1.name, item2.getParent().name, item2.name);
  			throw (new InvalidPropertyToColumnConversion(msg));
  		}
  
  	}
docs: Assert true or invalid property name.
  
  @param expression
  the expression
  @param item1
  the item 1
  @param item2
  the item 2