code: func NewLabelCommand(k string, v string, NoExp bool) *LabelCommand {
  	kvp := KeyValuePair{Key: k, Value: v}
  	c := "LABEL "
  	c += kvp.String()
  	nc := withNameAndCode{code: c, name: "label"}
  	cmd := &LabelCommand{
  		withNameAndCode: nc,
  		Labels: KeyValuePairs{
  			kvp,
  		},
  		noExpand: NoExp,
  	}
  	return cmd
  }
docs: // NewLabelCommand creates a new 'LABEL' command