fix(retail): add region tag for Java - Update Search with query expansion spec

[rebeccaellis]

Description

Fixes #415382524

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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/SearchWithQueryExpansionSpec.java:25, tag retail_search_for_products_with_query_expansion_specification

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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 improves the discoverability and reusability of a Java code sample for the Retail API's search functionality. By introducing specific region tags, the searchResponse method within the SearchWithQueryExpansionSpec.java file can now be easily identified and extracted for inclusion in documentation or tutorials, ensuring consistency between code and documentation.

Highlights

• Documentation: Added [START] and [END] region tags to the SearchWithQueryExpansionSpec.java sample. These tags specifically delineate the searchResponse method, enabling automated extraction of this code snippet for documentation purposes.

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[gemini-code-assist]

Code Review

This pull request adds region tags to the SearchWithQueryExpansionSpec.java sample. The changes are functionally correct, but there are a couple of minor style and consistency issues with the placement of the new tags. I've left comments with suggestions to align the formatting with other samples in the repository for better readability and maintainability.

[gemini-code-assist]

For consistency with other samples in this repository (e.g., SearchSimpleQuery.java) and to improve readability, please add a blank line before and after the START region tag. This separates the package declaration, sample tag, and import statements.

The desired format is:

package search;

// [START retail_search_for_products_with_query_expansion_specification]

import com.google.cloud.ServiceOptions;

[gemini-code-assist]

For better readability, please add a blank line before this END region tag. This helps to visually separate the code from the sample metadata tags.

For example:

  }
}

// [END retail_search_for_products_with_query_expansion_specification]