/**
 * The copy expression allows the copy SOP node to evaluates its input graph multiple times, and vary its result each time.
 *
 * @remarks
 * It takes 2 or 3 arguments
 *
 * `copy(input_index_or_node_path, default_value, attribute_name)`
 *
 * - `input_index_or_node_path` is a number or a string
 * - `default_value` is a number
 * - `attribute_name` is the attribute that will be stamped
 *
 * ## Usage
 *
 * - `copy('../copy1', 0, 'i')` - returns the index of each evaluation
 * - `copy('../copy1', 0)` - returns the index of each evaluation
 * - `copy('../copy1')` - returns the index of each evaluation
 * - `copy('../copy1', 0, 'id')` - returns the value of the 'id' attribute of the instance point, or 0 if the attribute doesn't exist
 *
 */
import { BaseMethodFindDependencyArgs } from './_Base';
import { BaseMethod } from './_Base';
import { MethodDependency } from '../MethodDependency';
export declare class CopyExpression extends BaseMethod {
    static requiredArguments(): string[][];
    static optionalArguments(): string[][];
    findDependency(args: BaseMethodFindDependencyArgs): MethodDependency | null;
    processArguments(args: any[]): Promise<any>;
}