code: public void setVariables(Map<String, String> variables)
      {
          if (this.variables != null)
          {
              this.variables.putAll(variables);
          }
          else
          {
              this.variables = variables;
          }
      }
docs: Sets the variables to set on the originated call.
  
  @param variables a Map containing the variable names as key and their
  values as value.
  @since 0.2