private String formatShapeId(Object value) {
            if (value == null) {
                return "";
            }
            ShapeId shapeId = ShapeId.from(String.valueOf(value));
            if (!shouldWriteNamespace(shapeId)) {
                return shapeId.asRelativeReference();
            }
            return shapeId.toString();
        }
Writes an empty line that contains only indentation appropriate to the current indentation level.

<p> This does not insert a trailing newline.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/SmithyIdlModelSerializer.java