Acl: update

import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.model.AclRule;

// ...

// Initialize Calendar service with valid OAuth credentials
Calendar service = new Calendar.Builder(httpTransport, jsonFactory, credentials)
    .setApplicationName("applicationName").build();

// Retrieve the access rule from the API
AclRule rule = service.acl().get('primary', "ruleId").execute();

// Make a change
rule.setRole("newRole");

// Update the access rule
AclRule updatedRule = service.acl().update('primary', rule.getId(), rule).execute();
System.out.println(updatedRule.getEtag());

rule = service.acl().get(calendarId='primary', ruleId='ruleId').execute()
rule['role'] = 'newRole'

updated_rule = service.acl().update(calendarId='primary', ruleId=rule['id'], body=rule).execute()
print updated_rule['etag']

$rule = $service->acl->get('primary', 'ruleId');
$rule->setRole('newRole');

$updatedRule = $service->acl->update('primary', $rule->getId(), $rule);
echo $updatedRule->getEtag();

rule = client.get_acl('primary', 'ruleId')
rule.role = 'newRole'
result = client.update_acl('primary', rule.id, rule)
print result.etag