docs: def lookup_effective_breakpoint(cls, file_name, line_number, frame):
          """ Checks if there is an enabled breakpoint at given file_name and 
          line_number. Check breakpoint condition if any.
          
          :return: found, enabled and condition verified breakpoint or None
          :rtype: IKPdbBreakpoint or None
          """
          bp = cls.breakpoints_by_file_and_line.get((file_name, line_number), None)
          if not bp:
              return None
              
          if not bp.enabled:
              return None
              
          if not bp.condition:
              return bp
          try:
              value = eval(bp.condition, frame.f_globals, frame.f_locals)
              return bp if value else None
          except:
              pass
          return None