@Override
    public GetIntrospectionSchemaResult getIntrospectionSchema(GetIntrospectionSchemaRequest request) {
        request = beforeClientExecution(request);
        return executeGetIntrospectionSchema(request);
    }
<p>
Retrieves the introspection schema for a GraphQL API.
</p>

@param getIntrospectionSchemaRequest
@return Result of the GetIntrospectionSchema operation returned by the service.
@throws GraphQLSchemaException
        The GraphQL schema is not valid.
@throws NotFoundException
        The resource specified in the request was not found. Check the resource, and then try again.
@throws UnauthorizedException
        You aren't authorized to perform this operation.
@throws InternalFailureException
        An internal AppSync error occurred. Try your request again.
@sample AWSAppSync.GetIntrospectionSchema
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/appsync-2017-07-25/GetIntrospectionSchema" target="_top">AWS
     API Documentation</a>
aws-java-sdk-appsync/src/main/java/com/amazonaws/services/appsync/AWSAppSyncClient.java