code: public com.squareup.okhttp.Call postCharactersCharacterIdCspaAsync(Integer characterId, List<Integer> requestBody,
              String datasource, String token, final ApiCallback<Float> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = postCharactersCharacterIdCspaValidateBeforeCall(characterId, requestBody,
                  datasource, token, callback);
          Type localVarReturnType = new TypeToken<Float>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }
docs: Calculate a CSPA charge cost (asynchronously) Takes a source character ID
  in the url and a set of target character ID&#39;s in the body, returns a
  CSPA charge cost --- SSO Scope: esi-characters.read_contacts.v1
  
  @param characterId
  An EVE character ID (required)
  @param requestBody
  The target characters to calculate the charge for (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param token
  Access token to use if unable to set a header (optional)
  @param callback
  The callback to be executed when the API call finishes
  @return The request call
  @throws ApiException
  If fail to process the API call, e.g. serializing the request
  body object