code: public ApiResponse<KillmailResponse> getKillmailsKillmailIdKillmailHashWithHttpInfo(String killmailHash,
              Integer killmailId, String datasource, String ifNoneMatch) throws ApiException {
          com.squareup.okhttp.Call call = getKillmailsKillmailIdKillmailHashValidateBeforeCall(killmailHash, killmailId,
                  datasource, ifNoneMatch, null);
          Type localVarReturnType = new TypeToken<KillmailResponse>() {
          }.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Get a single killmail Return a single killmail from its ID and hash ---
  This route is cached for up to 1209600 seconds
  
  @param killmailHash
  The killmail hash for verification (required)
  @param killmailId
  The killmail ID to be queried (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param ifNoneMatch
  ETag from a previous request. A 304 will be returned if this
  matches the current ETag (optional)
  @return ApiResponse&lt;KillmailResponse&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body