code: def _reverse_negate(v):
      return (-v[2], -v[1], -v[0])
  
imports: from fontTools.varLib.models import supportScalar
  from fontTools.misc.fixedTools import MAX_F2DOT14
  from functools import lru_cache
label_desc: Use image node_id 1 for calling a global function with example usage: _reverse_negate(v) and returns: unknown,  unknown,  unknown