node_modules/font-awesome/less/screen-reader.less - nifi-fds - Git at Google

 // Screen Readers
 // -------------------------

 .sr-only { .sr-only(); }
 .sr-only-focusable { .sr-only-focusable(); }
	// Screen Readers
	// -------------------------

	.sr-only { .sr-only(); }
	.sr-only-focusable { .sr-only-focusable(); }