code: public static void assertTrueOrUnknownPropertyInJQLException(boolean expression, JQLContext method,
  			String columnName) {
  		if (!expression) {
  			throw (new UnknownPropertyInJQLException(method, columnName));
  		}
  
  	}
docs: Assert true or unknown property in JQL exception.
  
  @param expression
  the expression
  @param method
  the method
  @param columnName
  the column name