public interface TemplateHashModelEx extends TemplateHashModel
TemplateHashModelby allowing iterating through its keys and values. Consider implementing the modern variation of this,
TemplateHashModelEx2, which allows the more efficient listing of key-value pairs.
In templates they are used like hashes, but these will also work (among others):
<#list myMap as k, v>.
int size() throws TemplateModelException
TemplateCollectionModel keys() throws TemplateModelException