In Estate of Bissinger (1964) 60 Cal.2d 756, a trustee of a testamentary trust, after a decree of distribution had become final, sought compensation in excess of that provided in the will and decree. The court said: " 'a decree of distribution that has become final is a conclusive determination of the terms and validity of a testamentary trust and of the rights of all parties thereunder', including the trustees ... ." (Id., at p. 762.) The Bissinger court, however, went on to say that the rule was not absolute and that "upon a proper showing of exigency or emergency the superior court sitting in probate has, and is intended by the Legislature to have, jurisdiction to change the compensation of the trustee as fixed by the testator and the decree of distribution. A contrary holding which would require the trustee to institute a separate proceeding in the superior court to adjudicate such compensation would result in the 'anomalous situation' citation that the trustee would be obliged to seek the approval of two courts ... ." (Estate of Bissinger, supra, 60 Cal.2d at p. 768.) Thus, Bissinger teaches that a probate court has the power to settle all disputes relating to the trust matters that come before it.