import { AbstractOperation } from './AbstractOperation';
export declare enum ConcatOperationType {
    'start' = "start",
    'end' = "end"
}
export declare class ConcatOperation extends AbstractOperation {
    readonly type: keyof typeof ConcatOperationType;
    readonly value: string;
    constructor(type: keyof typeof ConcatOperationType, value: string);
    getSerializableProperties(): (keyof this & string)[];
    getTextProperties(): (keyof this & string)[];
    static getAllowedTypes(): ConcatOperationType[];
}