export declare class SpelService {
    /** Evaluates a spel expression on the server against a previous executionId and stageId */
    static evaluateExpression(expression: string, executionId: string, stageId: string): PromiseLike<any>;
    /**
     * Parses an expression string (client-side)
     *
     * Throws an error if the expression is syntactically invalidat
     *
     * @param expression a SpEL expression templated string.
     *        e.g.: "This is a ${trigger.type} trigger"
     */
    static parseExpressionString(expression: string): void;
    /**
     * Determines if a string is a SpEL expression
     *
     * @param value The value to check for SpEL
     */
    static includesSpel(value: string): boolean;
}