code: def _find_integer_tolerance(epsilon, v_max, min_tol):
      
      int_tol = min(epsilon / (10 * v_max), 0.1)
      min_tol = max(1e-10, min_tol)
      if int_tol < min_tol:
          eps_lower = min_tol * 10 * v_max
          logger.warning(
              'When the maximum flux is {}, it is recommended that'
              ' epsilon > {} to avoid numerical issues with this'
              ' solver. Results may be incorrect with'
              ' the current settings!'.format(v_max, eps_lower))
          return min_tol
  
      return int_tol
docs: Find appropriate integer tolerance for gap-filling problems.