import type { BscType } from './BscType';
export declare class FunctionType implements BscType {
    returnType: BscType;
    constructor(returnType: BscType);
    /**
     * The name of the function for this type. Can be undefined
     */
    name: string | undefined;
    /**
     * Determines if this is a sub or not
     */
    isSub: boolean;
    params: {
        name: string;
        type: BscType;
        isOptional: boolean;
    }[];
    setName(name: string): this;
    addParameter(name: string, type: BscType, isOptional: boolean): this;
    isAssignableTo(targetType: BscType): boolean;
    isConvertibleTo(targetType: BscType): boolean;
    toString(): string;
    toTypeString(): string;
    clone(): FunctionType;
}