def resolve_path(ref)
      ref = ref.to_s
      if ref[0,1] == "/"
        Pathname(ref[1..-1])
      else
        path.parent + ref
      end
    end
def resolve_path(ref)
      ref = ref.to_s
      if ref[0,1] == "/"
        Pathname(ref[1..-1])
      else
        path.parent + ref
      end
    end
Public: Resolve a reference relative to this input.

 ref - a String referencing another asset

 A ref starting with "/" is resolved relative to the project root;
 anything else is resolved relative to this input.

 Returns a fully-qualified Pathname of the asset.