import type { ComponentClazz } from 'san';
export declare function isValidIdentifier(str: string): boolean;
export declare function getMemberFromClass<T>(clazz: ComponentClazz, property: string, defaultValue: T): T;
export declare function getMemberFromClass<T>(clazz: ComponentClazz, property: string): T | undefined;
export declare function functionString(fn: Function): string;
export declare function assertNever(arg: never): void;