class Prism::ConstantPathTargetNode

def child

continue to supply that API.
constant read or a missing node. To not cause a breaking change, we
Previously, we had a child node on this class that contained either a 
def child
  deprecated("name", "name_loc")
  if name
    ConstantReadNode.new(source, -1, name_loc, 0, name)
  else
    MissingNode.new(source, -1, location, 0)
  end
end