did not exist. See id. at 295. The Carlin court noted that other cases, finding that the claims of the nonsignatory party arise out of an agreement containing an arbitration clause, and the nonsignatory would have no claim in the absence of the underlying agreement, the arbitration clause was enforceable against the nonsig-natory. See id. at 295-96 (citing J.J. Ryan & Sons v. Rhone Poulenc Textile, S.A., 868 F.2d 315, 320-21 (4 th Cir.1988) (stating that when the claims against a parent company and its subsidiary are based on the same facts and are inherently inseparable, a court may refer claims against the parent to arbitration even though the parent is not formally a party to the arbitration agreement)); Merrill Lynch v. Eddings, 838 S.W.2d 874, 879 (Tex.App.-Waco 1992, writ denied) (<HOLDING>)). In a discussion on the doctrine of equitable
holding that an arbitration agreement is separable from the underlying agreement holding that nonsignatory settlor and trust beneficiaries could be compelled to arbitrate under account agreement between trustee and merrill lynch which contained an arbitration clause because agreement was the underlying basis for all the claims of the beneficiaries and there would have been no claims without the agreement holding that the settlor could divest the beneficiaries of their vested interests only by completely revoking the trust because she had limited her ability to eliminate the beneficiaries interests by including language in the trust stating that the interests of the beneficiaries  shall continue until this trust is revoked or terminated internal quotation marks omitted holding that trust beneficiaries have no authority to maintain an action as third party beneficiaries of contracts between the trustee and agents of the trustee concerning the internal affairs of the trust holding that language in a merrill lynch customer account agreement that the plaintiff signed upon opening the first account  providing for arbitration of any controversy  arising out of its business  applied to the disputed second account even though the plaintiff did not sign a separate customer account agreement for the second account