/**
 * Whether the installed Playwright routes its probe by npm's `npm_config_*`
 * proxy variables as well as the standard ones, which it did until 1.59.0
 * dropped them. The readiness gate and its graph-time inference follow the
 * installed version: ignoring a variable that version's own probe reads would
 * send the gate a different way than Playwright. `version` is the installed
 * version as `installedPlaywrightVersion` reads it; an unresolvable or
 * unparseable installation (`null`) reads as ignoring them, the semantics of
 * current versions.
 */
export declare function installedPlaywrightReadsNpmConfigProxy(version: string | null): boolean;