function validateApiKeyimport { validateApiKey } from "https://deno.land/x/serpapi@0.0.8/src/utils.ts"; validateApiKey(value: string | undefined | null): stringvalidateApiKey(value: string | undefined | null, allowNull: boolean): string | undefinedParametersvalue: string | undefined | nullReturnsstringParametersvalue: string | undefined | nullallowNull: booleanReturnsstring | undefined