type t('a) = Belt.MutableStack.t('a); let make = Belt.MutableStack.make; let clear = Belt.MutableStack.clear; let push = Belt.MutableStack.push; let pop = Belt.MutableStack.pop; let copy = Belt.MutableStack.copy; let size = Belt.MutableStack.size; let forEachU = Belt.MutableStack.forEachU; let forEach = Belt.MutableStack.forEach; let isEmpty = Belt.MutableStack.isEmpty; let top = Belt.MutableStack.top;