public AcceptAdministratorInvitationRequest withInvitationId(String invitationId) {
        setInvitationId(invitationId);
        return this;
    }
<p>
The value that is used to validate the administrator account to the member account.
</p>

@param invitationId
       The value that is used to validate the administrator account to the member account.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-guardduty/src/main/java/com/amazonaws/services/guardduty/model/AcceptAdministratorInvitationRequest.java