code: def add_parameter(self, name, value, meta=None):
          
          parameter = Parameter(name, value)
          if meta: parameter.meta = meta
          self.parameters.append(parameter)
docs: Add a parameter to the parameter list.
  
          :param name: New parameter's name.
          :type name: str
  
          :param value: New parameter's value.
          :type value: float
  
          :param meta: New parameter's meta property.
          :type meta: dict