}
                }
            }
            return outputFile.exists();
        });

    }

    /**
     * Checks if the response data contains an image MIME type that can be processed
     * for thumbnail generation.
     *
     * @param responseData the response data containing MIME type information

            logger.warn("Failed to get active instances.", e);
        }
        return instances;
    }

    /**
     * Checks whether the specified instance is currently active.
     *
     * @param targetInstanceId the instance ID to check.
     * @return {@code true} if the instance is active.
     */
    public boolean isInstanceActive(final String targetInstanceId) {

    public void test_isLogFilename_withEmptyString() {
        assertFalse(AdminLogAction.isLogFilename(""));
    }

    @Test
    public void test_isLogFilename_withPathSeparators() {
        // isLogFilename only checks the file extension, not path components
        assertTrue(AdminLogAction.isLogFilename("subdir/fess.log"));
        assertTrue(AdminLogAction.isLogFilename("../fess.log"));
    }

        }
        return SortBuilders.fieldSort(field).order(order);
    }

    /**
     * Checks if the specified field is a search field.
     * Uses O(1) Set lookup for improved performance.
     * @param field The field name to check.
     * @return True if the field is a search field, false otherwise.
     */
    protected boolean isSearchField(final String field) {

        final String key = entity.getVirtualHost();
        return StringUtil.isBlank(key) ? StringUtil.EMPTY : key;
    }

    /**
     * Retrieves related content for a given search query.
     * First checks for exact term matches, then evaluates regex patterns.
     * For regex matches, the query placeholder is replaced with the actual query.
     *
     * @param query the search query to find related content for

            }
        }
        return OptionalEntity.empty();
    }

    /**
     * Stores or updates a dictionary file in the ConfigSync storage.
     * This method checks for concurrent modifications by comparing timestamps
     * and uploads the file content to the ConfigSync API.
     *
     * @param dictFile the dictionary file metadata to store

                        .forEach(q -> queryBuf.append(" timestamp:").append(q.trim())));
    }

    /**
     * Checks if a value represents an occurrence-based search modifier.
     * Currently supports "allintitle" and "allinurl" modifiers.
     *
     * @param value the value to check
     * @return true if the value is an occurrence modifier, false otherwise
     */

        } catch (final Exception e) {
            throw new ScheduledJobException("Failed to delete Job: " + scheduledJob, e);
        }
    }

    /**
     * Checks if a job with the specified ID is available.
     *
     * @param id the job ID to check
     * @return true if the job is available, false otherwise
     */
    public boolean isAvailable(final String id) {

            return true;
        }

        return false;
    }

    /**
     * Checks if a plugin version is a target version for the current Fess installation.
     *
     * @param version the version to check
     * @return true if the version is a target version, false otherwise
     */
    protected boolean isTargetPluginVersion(final String version) {

            System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, newValue);

            // Get value again - in real FessConfigImpl it would be cached,
            // but our test implementation always checks system properties
            String value2 = fessConfig.get(testKey);
            // In our test implementation, it will pick up the new value
            assertEquals(newValue, value2);
        } finally {