/**
 * returns the index of a character inside a string
 *
 * @remarks
 * It takes 2 arguments
 *
 * strIndex(<word\>, <character\>)
 *
 * - **<word\>** - a string
 * - **<character\>** - a string
 *
 * ## Usage
 *
 * - `strIndex('abcd ', 'c')` - returns 2
 *
 */
import { BaseMethod } from './_Base';
export declare class StrIndexExpression extends BaseMethod {
    static required_arguments(): string[][];
    process_arguments(args: any[]): Promise<number>;
}