code: public BankAccount create(BankAccount bankAccount, String customerId) throws BaseException {
  
  		logger.debug("Enter BankAccountService::create");
  		
  		if (StringUtils.isBlank(customerId)) {
  			logger.error("IllegalArgumentException {}", customerId);
  			throw new IllegalArgumentException("customerId cannot be empty or null");
  		}
  
  		// prepare API url
  		String apiUrl = requestContext.getBaseUrl().replaceAll("payments", "customers") + "{id}/bank-accounts"
  				.replaceAll("\\{format\\}", "json").replaceAll("\\{" + "id" + "\\}", customerId.toString());
  		logger.info("apiUrl - " + apiUrl);
  		
  		// assign TypeReference for deserialization
  		TypeReference<BankAccount> typeReference = new TypeReference<BankAccount>() {
  		};
  
  		// prepare service request
  		Request request = new Request.RequestBuilder(MethodType.POST, apiUrl).requestObject(bankAccount)
  				.typeReference(typeReference).context(requestContext).build();
  
  		// make API call
  		Response response = sendRequest(request);
  		// retrieve response
  		BankAccount bankAccountResponse = (BankAccount) response.getResponseObject();
  
  		// set additional attributes
  		prepareResponse(request, response, bankAccountResponse);
  		return bankAccountResponse;
  	}
docs: Method to create BankAccount for a given customer
  
  @param bankAccount
  @param customerId
  @return
  @throws BaseException