code: @Override
      public boolean canEdit(ProjectEntity entity, SecurityService securityService) {
          return securityService.isProjectFunctionGranted(entity.projectId(), ProjectConfig.class) &&
                  propertyService.hasProperty(
                          entity.getProject(),
                          SVNProjectConfigurationPropertyType.class);
      }
docs: One can edit the SVN configuration of a branch only if he can configurure a project and if the project
  is itself configured with SVN.