text: 
  #ifndef STRINGUTILS_H_
  #define STRINGUTILS_H_
  #include <string>
  
  namespace license {
  using namespace std;
  
  /**
   * Eliminate whitespace from both sides of a string and returns a copy
   * of the string itself.
   * @param string_to_trim
   * @return the trimmed string
   */
  string trim_copy(const string& string_to_trim);
  
  string toupper_copy(const string& lowercase);
  
  time_t seconds_from_epoch(const char* s);
  } /* namespace license */
  
  #endif /* STRINGUTILS_H_ */
  