Navigate to a named property of the current element Multiple properties can be chained
A block can also be passed, but in that case, dependency tracking is disabled for the rest of the chain.
def nav(*path, &block)
if path.empty?
return (block ? with(unscoped, &block) : reset_key.reset_continue)
end
property = path.first.dup.freeze
construct_node { |node| Nodes::Nav.new(property, node) }
.nav(*path[1..-1], &block)
end