code: func (s *ProjectService) GetPermissionScheme(projectID string) (*PermissionScheme, *Response, error) {
  	apiEndpoint := fmt.Sprintf("/rest/api/2/project/%s/permissionscheme", projectID)
  	req, err := s.client.NewRequest("GET", apiEndpoint, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	ps := new(PermissionScheme)
  	resp, err := s.client.Do(req, ps)
  	if err != nil {
  		jerr := NewJiraError(resp, err)
  		return nil, resp, jerr
  	}
  
  	return ps, resp, nil
  }
docs: // GetPermissionScheme returns a full representation of the permission scheme for the project
  // JIRA will attempt to identify the project by the projectIdOrKey path parameter.
  // This can be an project id, or an project key.
  //
  // JIRA API docs: https://docs.atlassian.com/jira/REST/latest/#api/2/project-getProject