code: @Override
      public GetContextKeysForPrincipalPolicyResult getContextKeysForPrincipalPolicy(GetContextKeysForPrincipalPolicyRequest request) {
          request = beforeClientExecution(request);
          return executeGetContextKeysForPrincipalPolicy(request);
      }
docs: <p>
  Gets a list of all of the context keys referenced in all the IAM policies that are attached to the specified IAM
  entity. The entity can be an IAM user, group, or role. If you specify a user, then the request also includes all
  of the policies attached to groups that the user is a member of.
  </p>
  <p>
  You can optionally include a list of one or more additional policies, specified as strings. If you want to
  include <i>only</i> a list of policies by string, use <a>GetContextKeysForCustomPolicy</a> instead.
  </p>
  <p>
  <b>Note:</b> This API discloses information about the permissions granted to other users. If you do not want
  users to see other user's permissions, then consider allowing them to use <a>GetContextKeysForCustomPolicy</a>
  instead.
  </p>
  <p>
  Context keys are variables maintained by AWS and its services that provide details about the context of an API
  query request. Context keys can be evaluated by testing against a value in an IAM policy. Use
  <a>GetContextKeysForPrincipalPolicy</a> to understand what key names and values you must supply when you call
  <a>SimulatePrincipalPolicy</a>.
  </p>
  
  @param getContextKeysForPrincipalPolicyRequest
  @return Result of the GetContextKeysForPrincipalPolicy operation returned by the service.
  @throws NoSuchEntityException
  The request was rejected because it referenced a resource entity that does not exist. The error message
  describes the resource.
  @throws InvalidInputException
  The request was rejected because an invalid or out-of-range value was supplied for an input parameter.
  @sample AmazonIdentityManagement.GetContextKeysForPrincipalPolicy
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/GetContextKeysForPrincipalPolicy"
  target="_top">AWS API Documentation</a>