export interface OtType<Document, Operation> {
    /** Should return a falsy value if operation is valid. */
    validate: (op: Operation) => unknown;
    normalize: (op: Operation) => Operation;
    apply: (document: Document, op: Operation) => Document;
    compose: (op1: Operation, op2: Operation) => Operation;
    transform: (op: Operation, against: Operation, leftWins: boolean) => Operation;
}