public GlideBuilder setDecodeFormat(DecodeFormat decodeFormat) {
        this.decodeFormat = decodeFormat;
        return this;
    }
Sets the {@link DecodeFormat} that will be the default format for all the default
decoders that can change the {@link android.graphics.Bitmap.Config} of the {@link android.graphics.Bitmap}s they
decode.

<p>
    Decode format is always a suggestion, not a requirement. See {@link DecodeFormat} for
    more details.
</p>

<p>
    If you instantiate and use a custom decoder, it will use
    {@link DecodeFormat#DEFAULT} as its default.
</p>

<p>
    Calls to this method are ignored on KitKat and Lollipop. See #301.
</p>

@param decodeFormat The format to use.
@return This builder.
core/src/main/java/com/bumptech/glide/GlideBuilder.java