asString
Coerces input to its rendered string form using the same rule as {{ identifier }}:
nullrenders as the literal string"null".A string com.commonsware.kpointer.adapter.KpaPrimitive renders as its
stringOrNullcontent (no quotes).A non-string com.commonsware.kpointer.adapter.KpaPrimitive renders via
renderedString().A com.commonsware.kpointer.adapter.KpaStruct or com.commonsware.kpointer.adapter.KpaList renders in a compact JSON-ish structural form.
Return
the rendered string form.
Parameters
input
the element to coerce; may be null.