class RuboCop::Cop::Sorbet::SignatureBuildOrder

def call_chain(node)

Split foo.bar.baz into [foo, foo.bar, foo.bar.baz] 
def call_chain(node)
  chain = []
  while node&.send_type?
    chain << node
    node = node.receiver
  end
  chain.reverse!
  chain
end