public function addInteger($str_name, $bol_index = TRUE)
    {
        return $this->addProperty($str_name, self::PROPERTY_INTEGER, $bol_index);
    }
public function addInteger($str_name, $bol_index = TRUE)
    {
        return $this->addProperty($str_name, self::PROPERTY_INTEGER, $bol_index);
    }
public function addInteger ( $ str_name , $ bol_index = TRUE ) { return $ this -> addProperty ( $ str_name , self :: PROPERTY_INTEGER , $ bol_index ) ; }
Add an integer field to the schema

@param $str_name
@param bool $bol_index
@return Schema
Add an integer field to the schema