private Map<String, String> toMap(List<EnvironmentVariableItem> variables) {
   HashMap<String, String> environmentVariables = new LinkedHashMap<String, String>();
   for (EnvironmentVariableItem variable : variables) {
     environmentVariables.put(variable.getName(), variable.getValue());
   }
   return environmentVariables;
 }
 public EnvironmentVariableItem getVariable(String name) {
   for (EnvironmentVariableItem variable : variables) {
     if (variable.getName().equals(name)) {
       return variable;
     }
   }
   return null;
 }