public function of(string $formulaName)
    {
        if (! isset($this->results[$formulaName])) {
            throw new CalculusResultNotFound('No result found for the given formula : ' . $formulaName );
        }

        return $this->results[$formulaName];
    }
public function of(string $formulaName)
    {
        if (! isset($this->results[$formulaName])) {
            throw new CalculusResultNotFound('No result found for the given formula : ' . $formulaName );
        }

        return $this->results[$formulaName];
    }
public function of ( string $ formulaName ) { if ( ! isset ( $ this -> results [ $ formulaName ] ) ) { throw new CalculusResultNotFound ( 'No result found for the given formula : ' . $ formulaName ) ; } return $ this -> results [ $ formulaName ] ; }
Returns a specific result by key
@param string $formulaName
@return mixed
@throws CalculusResultNotFound
Returns a specific result by key