Imports of package middleware

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
github.com/aws/aws-sdk-go-v2/internal/context
github.com/aws/smithy-go/middlewarePackage middleware provides transport agnostic middleware for decorating SDK handlers.
sync/atomicPackage atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms.
timePackage time provides functionality for measuring and displaying time.