code: func (c *Files) GetMetadata(in *GetMetadataInput) (out *GetMetadataOutput, err error) {
  	body, err := c.call("/files/get_metadata", in)
  	if err != nil {
  		return
  	}
  	defer body.Close()
  
  	err = json.NewDecoder(body).Decode(&out)
  	return
  }
docs: // GetMetadata returns the metadata for a file or folder.