如何在保留空白的同时在GO lang中解组YAML？

I have a YAML like

data:
  label1:
    - someval1
    - someval2
  label2:
    - otherval1
    - otehrval2

Using YAML parser "gopkg.in/yaml.v2"

yaml.Unmarshal([]byte(yamlStr), &yamlObj)

# Some works and changes to yamlObj

s, _ := yaml.Marshal(&yamlObj)
fmt.Println(string(s))

This outputs:

data:
  label1:
  - someval1
  - someval2
  label2:
  - otherval1
  - otehrval2

The resulted YAML is correct but for my task I need lists (- values) indented as in original YAML. Is there a way to preserve those spaces and new lines?