code: func extractWorkItemTypeFields(wit workitem.WorkItemType) ([]string, []string, error) {
  	fieldLabels := []string{}
  	fieldKeys := []string{}
  	for fieldKey, fieldDefinition := range wit.Fields {
  		// extract the label and key
  		fieldLabels = append(fieldLabels, fieldDefinition.Label)
  		fieldKeys = append(fieldKeys, fieldKey)
  	}
  	return fieldLabels, fieldKeys, nil
  }
docs: // extractWorkItemTypeFields extracts the field information for a wit; it returns slices for
  // field labels and field keys