Mischna zu Maasrot 3:12

A tree which stood within [Jerusalem] and was bending outwards, or if it stood outside [Jerusalem] and was bending inwards, what is opposite the wall and inwards is deemed as being within, and what is opposite the wall and outwards is deemed as being outside. Olive-presses which have their entrance within and their inner space outside, or which have their entrance outside and their inner space within: Bet Shammai says: the whole is deemed as being within. But Bet Hillel says: what is opposite the wall and inwards is deemed as being within, and what is opposite the wall and outwards is deemed as being outside.