code: func NewUsingBigExp(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
  	return &usingBigExp{
  		pkg:   "*math/big.Int",
  		calls: []string{"Exp"},
  		MetaData: gosec.MetaData{
  			ID:         id,
  			What:       "Use of math/big.Int.Exp function should be audited for modulus == 0",
  			Severity:   gosec.Low,
  			Confidence: gosec.High,
  		},
  	}, []ast.Node{(*ast.CallExpr)(nil)}
  }
docs: // NewUsingBigExp detects issues with modulus == 0 for Bignum