text: import dis
  
  from functools import lru_cache
  from types import CodeType
  from typing import FrozenSet
  
  from scalene.scalene_statistics import *
  
  
  class ScaleneFuncUtils:
  
      # We use these in is_call_function to determine whether a
      # particular bytecode is a function call.  We use this to
      # distinguish between Python and native code execution when
      # running in threads.
      __call_opcodes: FrozenSet[int] = frozenset(
          {
              dis.opmap[op_name]
              for op_name in dis.opmap
              if op_name.startswith("CALL_FUNCTION")
          }
      )
  
      @staticmethod
      @lru_cache(maxsize=None)
      def is_call_function(code: CodeType, bytei: ByteCodeIndex) -> bool:
          """Returns true iff the bytecode at the given index is a function call."""
          return any((ins.offset == bytei
                      and ins.opcode in ScaleneFuncUtils.__call_opcodes)
                     for ins in dis.get_instructions(code))
  