.thumbnail() should allow different forms of loading

[TWiStErRob]

The following examples should work:

    Glide.with(mContext)
    .load(my.package.name.R.drawable.thumbnail)
    .thumbnail(
        Glide.with(mContext)
        .load("android.resource://my.package.name/drawable/thumbnail")
    )
    .into(type);

The method thumbnail(DrawableRequestBuilder) in the type DrawableRequestBuilder is not applicable for the arguments (DrawableTypeRequest)

    Glide.with(mContext)
    .load("android.resource://my.package.name/drawable/thumbnail")
    .thumbnail(
        Glide.with(mContext)
        // of course properly called with an object
        .using((ModelLoader<DriveId, Contents>)null, Contents.class)
        .load(driveId)
        .as(BitmapDrawable.class)
    )
    .into(type);

The method thumbnail(DrawableRequestBuilder) in the type DrawableRequestBuilder is not applicable for the arguments (GenericTranscodeRequest<DriveId,Contents,BitmapDrawable>)

This looks very much like what .placeholder() is for, but you can imagine changing those arguments dynamically per image.