def add_parameters(pValue)
      unless ((pValue.respond_to?(:has_key?) && pValue.length == 1) ||
               pValue.respond_to?(:to_str))
        return nil
      end
      @parameters.push(pValue)
    end
def add_parameters(pValue)
      unless ((pValue.respond_to?(:has_key?) && pValue.length == 1) ||
               pValue.respond_to?(:to_str))
        return nil
      end
      @parameters.push(pValue)
    end
Add parameters inside function.
 @param pValue Add a parameter inside function.
 @return if pValue is not String or Hash with more than one element.
         return nil.