public String getPrincipal() {
        return this.principal;
    }
<p>
The Amazon Web Services service or identity that will have its CA permissions revoked. At this time, the only
valid service principal is <code>acm.amazonaws.com</code>
</p>

@return The Amazon Web Services service or identity that will have its CA permissions revoked. At this time, the
        only valid service principal is <code>acm.amazonaws.com</code>
aws-java-sdk-acmpca/src/main/java/com/amazonaws/services/acmpca/model/DeletePermissionRequest.java