$insights->subdivision does not exist. $insights->subdivisions returns a
list of subdivisions and $insights->most_specific_subdivision returns
the most specific subdivision.
Coverage remained the same at 99.142% when pulling 8effeea4464e72d6d54bf85af6ea507248c034ff on greg/fix-subdivision-method into c6af1b6441474c76f0649fb753fad532f3b5b391 on master.
$insights->subdivision does not exist. $insights->subdivisions returns a list of subdivisions and $insights->most_specific_subdivision returns the most specific subdivision.