docs: private static void assertEnvironment(Path graknHome, Path graknProperties) {
          String javaVersion = System.getProperty("java.specification.version");
          if (!javaVersion.equals("1.8")) {
              throw new RuntimeException(ErrorMessage.UNSUPPORTED_JAVA_VERSION.getMessage(javaVersion));
          }
          if (!graknHome.resolve("conf").toFile().exists()) {
              throw new RuntimeException(ErrorMessage.UNABLE_TO_GET_GRAKN_HOME_FOLDER.getMessage());
          }
          if (!graknProperties.toFile().exists()) {
              throw new RuntimeException(ErrorMessage.UNABLE_TO_GET_GRAKN_CONFIG_FOLDER.getMessage());
          }
      }