function emitWarning() {
	  if (typeof process === 'undefined')
	    return;

	  // Skip maintenance mode message in Lambda environments
	  if (
	    typeof process.env === 'object' &&
	    typeof process.env.AWS_EXECUTION_ENV !== 'undefined' &&
	    process.env.AWS_EXECUTION_ENV.indexOf('AWS_Lambda_') === 0
	  ) {
	    return;
	  }

	  if (
	    typeof process.env === 'object' &&
	    typeof process.env.AWS_SDK_JS_SUPPRESS_MAINTENANCE_MODE_MESSAGE !== 'undefined'
	  ) {
	    return;
	  }

	  if (typeof process.emitWarning === 'function') {
	    process.emitWarning(warning, {
	      type: 'NOTE'
	    });
	  }
	}
To suppress this message:
@example
require('aws-sdk/lib/maintenance_mode_message').suppress = true;