code: def _(x, y):
      """
      Subtractions in interval arithmetic
      https://en.wikipedia.org/wiki/Interval_arithmetic
      """
      return Interval(
          x.start - y.end,
          x.end - y.start,
          x.left_open or y.right_open,
          x.right_open or y.left_open,
      )
  
file_path: sympy/sympy/sets/handlers/add.py
imports: from sympy.core.numbers import oo, Infinity, NegativeInfinity
  from sympy.core.singleton import S
  from sympy.core import Basic, Expr
  from sympy.multipledispatch import Dispatcher
  from sympy.sets import Interval, FiniteSet
label_desc: Use image node_id 8 for calling a global function with example usage: _(x, y) and returns: Interval