public String getPolicyHash() {
        return this.policyHash;
    }
<p>
ID of the current policy version. The hash helps to prevent a situation where multiple users attempt to overwrite
a policy. You must provide this hash when updating or deleting a policy.
</p>

@return ID of the current policy version. The hash helps to prevent a situation where multiple users attempt to
        overwrite a policy. You must provide this hash when updating or deleting a policy.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/PutResourcePolicyRequest.java