protected function ensure_instances_exist($region) {
        $this->check_region_is_known($region);
        if (!array_key_exists($region, $this->blockinstances)) {
            $this->blockinstances[$region] =
                    $this->create_block_instances($this->birecordsbyregion[$region]);
        }
    }
protected function ensure_instances_exist($region) {
        $this->check_region_is_known($region);
        if (!array_key_exists($region, $this->blockinstances)) {
            $this->blockinstances[$region] =
                    $this->create_block_instances($this->birecordsbyregion[$region]);
        }
    }
protected function ensure_instances_exist ( $ region ) { $ this -> check_region_is_known ( $ region ) ; if ( ! array_key_exists ( $ region , $ this -> blockinstances ) ) { $ this -> blockinstances [ $ region ] = $ this -> create_block_instances ( $ this -> birecordsbyregion [ $ region ] ) ; } }
Ensure block instances exist for a given region

@param string $region Check for bi's with the instance with this name
Ensure block instances exist for a given region