/**
  * @brief Check if this version is less than an other one.
  * @param SchemaVersion $other The other version to compare at.
  */
 public function isLess($other)
 {
     if ($this->getMajor() < $other->getMajor()) {
         return true;
     }
     if ($this->getMajor() == $other->getMajor() && $this->getMinor() < $other->getMinor()) {
         return true;
     }
     return false;
 }