import { IEnvironmentVariablesProvider } from '../environment-variables-interfaces/i-environment-variables-provider.interface';
/**
 * An implementation of the IEnvironmentVariablesProvider interface that can provide the value of
 * previously configured variables.
 */
export declare class EnvironmentVariablesCatalog implements IEnvironmentVariablesProvider {
    readonly __i_environment_variables_provider__: true;
    private _variableNamesToValueMap;
    protected get variableNamesToValueMap(): Map<string, string>;
    constructor();
    get(variableName: string): string;
    set(variableName: string, variableValue: string): void;
}