code: import stripe
  stripe.api_key = "sk_test_your_key"
  
  stripe.issuing.FundingInstructions.TestHelpers.fund(
    "fi_1LSe6U2eZvKYlo2CQw6IsejT",
    currency="eur",
    amount=4200,
  )
  '''Response {
    "object": "funding_instructions",
    "bank_transfer": {
      "country": "DE",
      "financial_addresses": [
        {
          "iban": {
            "account_holder_name": "Stripe Technology Europe Limited",
            "bic": "SXPYDEHH",
            "country": "DE",
            "iban": "DE00000000000000000001"
          },
          "supported_networks": [
            "sepa"
          ],
          "type": "iban"
        }
      ],
      "type": "eu_bank_transfer"
    },
    "currency": "eur",
    "funding_type": "bank_transfer",
    "livemode": false
  }'''
nl: Simulate a top upSimulates an external bank transfer and adds funds to an Issuing balance.
  This method can only be called in test mode.Parameters amount required The amount to top up currency required The currency to top upReturnsReturns testmode funding instructions for an Issuing balanc