// manipulate the env_vector by adding or removing variables\r
// adding a name that already exists replaces its value\r
void add (const std::string& name, const std::string& value);\r
bool remove (const std::string& name);\r
// manipulate the env_vector by adding or removing variables\r
// adding a name that already exists replaces its value\r
void add (const std::string& name, const std::string& value);\r
bool remove (const std::string& name);\r