Unable to create with template editor empty (string array) multivalued property

It is not possible to create a property and leave it empty (not even "") with current template engine.

For example, I have

[hippo:facetselect] > nt:unstructured

• hippo:docbase (string) mandatory
• hippo:facets (string) mandatory multiple
• hippo:values (string) mandatory multiple
• hippo:modes (string) mandatory multiple < 'select', 'stick', 'clear'
  + * multiple

as nodetype for facetselect, BUT, I need to be able to create

node = node.addNode("n", HippoNodeType.NT_FACETSELECT);
node.setProperty(HippoNodeType.HIPPO_DOCBASE, "/test");
node.setProperty(HippoNodeType.HIPPO_FACETS, new String[] { });
node.setProperty(HippoNodeType.HIPPO_VALUES, new String[] { });
node.setProperty(HippoNodeType.HIPPO_MODES, new String[] { });

So, only adding the property, but have an empty string array