…ndQuickLookable, and _DefaultCustomPlaygroundQuickLookable.
The non-underscored variants are deprecated, but PlaygroundLogger needs to use these types as part of its implementation.
The underscored variants exist without deprecations so code which truly needs them (i.e. the standard library and PlaygroundLogger) can use them without warnings.
…ndQuickLookable, and _DefaultCustomPlaygroundQuickLookable.
The non-underscored variants are deprecated, but PlaygroundLogger needs to use these types as part of its implementation. The underscored variants exist without deprecations so code which truly needs them (i.e. the standard library and PlaygroundLogger) can use them without warnings.
This addresses rdar://problem/45287607.