code: func ChannelRestrictionsValue(maxChannelCount uint64) *StandardConfigValue {
  	return &StandardConfigValue{
  		key: ChannelRestrictionsKey,
  		value: &ab.ChannelRestrictions{
  			MaxCount: maxChannelCount,
  		},
  	}
  }
docs: // ChannelRestrictionsValue returns the config definition for the orderer channel restrictions.
  // It is a value for the /Channel/Orderer group.