import { EnvSchema, EnvReturnType } from "./types";
declare global {
    var envFirstLogging: boolean;
}
export declare class EnvManager<TVariables extends EnvSchema> {
    protected readonly variables: TVariables;
    protected env: Map<string, string | number | boolean>;
    constructor(variables: TVariables);
    protected validate(): void;
    load(): void;
    $<TKey extends keyof TVariables>(key: TKey, cache?: boolean): EnvReturnType<TVariables[TKey]>;
    protected hasDefault(variable?: {
        default?: unknown;
    } | null): variable is {
        default: unknown;
    };
}
export * from "./merge";
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