import { Command as $Command } from "@smithy/smithy-client";
import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { AppSyncClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../AppSyncClient";
import type { GetGraphqlApiEnvironmentVariablesRequest, GetGraphqlApiEnvironmentVariablesResponse } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
export { $Command };
/**
 * @public
 *
 * The input for {@link GetGraphqlApiEnvironmentVariablesCommand}.
 */
export interface GetGraphqlApiEnvironmentVariablesCommandInput extends GetGraphqlApiEnvironmentVariablesRequest {
}
/**
 * @public
 *
 * The output of {@link GetGraphqlApiEnvironmentVariablesCommand}.
 */
export interface GetGraphqlApiEnvironmentVariablesCommandOutput extends GetGraphqlApiEnvironmentVariablesResponse, __MetadataBearer {
}
declare const GetGraphqlApiEnvironmentVariablesCommand_base: {
    new (input: GetGraphqlApiEnvironmentVariablesCommandInput): import("@smithy/smithy-client").CommandImpl<GetGraphqlApiEnvironmentVariablesCommandInput, GetGraphqlApiEnvironmentVariablesCommandOutput, AppSyncClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    new (input: GetGraphqlApiEnvironmentVariablesCommandInput): import("@smithy/smithy-client").CommandImpl<GetGraphqlApiEnvironmentVariablesCommandInput, GetGraphqlApiEnvironmentVariablesCommandOutput, AppSyncClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/middleware-endpoint").EndpointParameterInstructions;
};
/**
 * <p>Retrieves the list of environmental variable key-value pairs associated with an API by
 *          its ID value.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { AppSyncClient, GetGraphqlApiEnvironmentVariablesCommand } from "@aws-sdk/client-appsync"; // ES Modules import
 * // const { AppSyncClient, GetGraphqlApiEnvironmentVariablesCommand } = require("@aws-sdk/client-appsync"); // CommonJS import
 * // import type { AppSyncClientConfig } from "@aws-sdk/client-appsync";
 * const config = {}; // type is AppSyncClientConfig
 * const client = new AppSyncClient(config);
 * const input = { // GetGraphqlApiEnvironmentVariablesRequest
 *   apiId: "STRING_VALUE", // required
 * };
 * const command = new GetGraphqlApiEnvironmentVariablesCommand(input);
 * const response = await client.send(command);
 * // { // GetGraphqlApiEnvironmentVariablesResponse
 * //   environmentVariables: { // EnvironmentVariableMap
 * //     "<keys>": "STRING_VALUE",
 * //   },
 * // };
 *
 * ```
 *
 * @param GetGraphqlApiEnvironmentVariablesCommandInput - {@link GetGraphqlApiEnvironmentVariablesCommandInput}
 * @returns {@link GetGraphqlApiEnvironmentVariablesCommandOutput}
 * @see {@link GetGraphqlApiEnvironmentVariablesCommandInput} for command's `input` shape.
 * @see {@link GetGraphqlApiEnvironmentVariablesCommandOutput} for command's `response` shape.
 * @see {@link AppSyncClientResolvedConfig | config} for AppSyncClient's `config` shape.
 *
 * @throws {@link AccessDeniedException} (client fault)
 *  <p>You don't have access to perform this operation on this resource.</p>
 *
 * @throws {@link BadRequestException} (client fault)
 *  <p>The request is not well formed. For example, a value is invalid or a required field is
 *          missing. Check the field values, and then try again.</p>
 *
 * @throws {@link InternalFailureException} (server fault)
 *  <p>An internal AppSync error occurred. Try your request again.</p>
 *
 * @throws {@link NotFoundException} (client fault)
 *  <p>The resource specified in the request was not found. Check the resource, and then try
 *          again.</p>
 *
 * @throws {@link UnauthorizedException} (client fault)
 *  <p>You aren't authorized to perform this operation.</p>
 *
 * @throws {@link AppSyncServiceException}
 * <p>Base exception class for all service exceptions from AppSync service.</p>
 *
 *
 * @public
 */
export declare class GetGraphqlApiEnvironmentVariablesCommand extends GetGraphqlApiEnvironmentVariablesCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: GetGraphqlApiEnvironmentVariablesRequest;
            output: GetGraphqlApiEnvironmentVariablesResponse;
        };
        sdk: {
            input: GetGraphqlApiEnvironmentVariablesCommandInput;
            output: GetGraphqlApiEnvironmentVariablesCommandOutput;
        };
    };
}