fix(retail): add region tag for Java - Update search with filtering

[rebeccaellis]

Description

Fixes #415382524

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed Sample Format Guide
• pom.xml parent set to latest shared-configuration
• Appropriate changes to README are included in PR
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• Tests pass: mvn clean verify required
• Lint passes: mvn -P lint checkstyle:check required
• Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• retail/interactive-tutorials/src/main/java/search/SearchWithFiltering.java:23, tag retail_search_for_products_with_filtering

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[gemini-code-assist]

Summary of Changes

Hello @rebeccaellis, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses an issue by implementing standard Google Cloud region tags within a Java code sample for the Retail API. The primary purpose is to enable accurate and automated extraction of this specific code snippet for inclusion in official documentation, making it easier for users to find and utilize the 'search with filtering' functionality.

Highlights

• Documentation Tagging: Added [START] and [END] region tags to the SearchWithFiltering.java sample file.
• Code Sample Extraction: The new region tag, retail_search_for_products_with_filtering, now properly delineates the code snippet for search with filtering, enabling its automatic extraction for documentation.

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[gemini-code-assist]

Code Review

This pull request adds region tags to the SearchWithFiltering.java sample file. The change is minor, but I've identified a small formatting inconsistency that should be addressed to maintain a consistent style across the codebase.

[gemini-code-assist]

For consistency with other sample files in this directory (e.g., SearchSimpleQuery.java and SearchWithPagination.java) and to adhere to common Java styling conventions, please add a blank line between the package declaration and this // [START ...] region tag.¹

The common convention in this repository and a general best practice is to separate the package declaration from the rest of the file with a blank line, which improves readability.

The desired format is:

package ...;

// [START ...]

import ...;

Style Guide References

Footnotes

1. The Google Java Style Guide (section 4.6.1 on blank lines) recommends a single blank line to separate logical sections of a source file, such as between the package statement and import statements or class declarations. ↩