docs: def recursive_insert(self, node, coord, data, start, end):
          """Recursively inserts id data into nodes"""
          if node[0] != -1:
              left = (start, node[0])
              right = (node[0], end)
  
              #if left is totally within coord
              if self.is_within(left, coord):
                  node[1][-1].append(data)
              elif self.overlap(left, coord):
                  self.recursive_insert(node[1], coord, data, left[0], left[1])
  
              if self.is_within(right, coord):
                  node[2][-1].append(data)
              elif self.overlap(right, coord):
                  self.recursive_insert(node[2], coord, data, right[0], right[1])