/**
 * 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 requiredArguments(): string[][];
    processArguments(args: any[]): Promise<number>;
}