text: #ifndef __ENGUNITS_ENERGY_H
  #define __ENGUNITS_ENERGY_H
  
  #include<iostream>
  #include<string>
  
  #include "../engunits/_abstract/abstract_unit.h"
  #include "../engunits/_conversion/energy_conversion.h"
  
  namespace engunits::energy{
  
  }
  
  #endif