public function setLowerBound($lowerBound)
    {
        if (is_float($lowerBound) || is_double($lowerBound) || (is_bool($lowerBound) && $lowerBound === false)) {
            $this->lowerBound = $lowerBound;
        } else {
            $msg = "The 'lowerBound' attribute must be a float or false, '" . gettype($lowerBound) . "' given.";
            throw new InvalidArgumentException($msg);
        }
    }
public function setLowerBound($lowerBound)
    {
        if (is_float($lowerBound) || is_double($lowerBound) || (is_bool($lowerBound) && $lowerBound === false)) {
            $this->lowerBound = $lowerBound;
        } else {
            $msg = "The 'lowerBound' attribute must be a float or false, '" . gettype($lowerBound) . "' given.";
            throw new InvalidArgumentException($msg);
        }
    }
public function setLowerBound ( $ lowerBound ) { if ( is_float ( $ lowerBound ) || is_double ( $ lowerBound ) || ( is_bool ( $ lowerBound ) && $ lowerBound === false ) ) { $ this -> lowerBound = $ lowerBound ; } else { $ msg = "The 'lowerBound' attribute must be a float or false, '" . gettype ( $ lowerBound ) . "' given." ; throw new InvalidArgumentException ( $ msg ) ; } }
Set the lower bound.

@param boolean|float $lowerBound A float or false if not lower bound.
@throws \InvalidArgumentException If $lowerBound is not a float nor false.
Set the lower bound .