Copybara import of the project:

--
8d16feb by release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>:

chore(main): release 1.54.0 (#989)

* chore(main): release 1.54.0

* Update CHANGELOG.md

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Jaycee Li <102714969+jaycee-li@users.noreply.github.com>
--
af7fdc9 by release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>:

chore(main): release 1.55.0-SNAPSHOT

COPYBARA_INTEGRATE_REVIEW=#1039 from googleapis:release-please--branches--main af7fdc9
PiperOrigin-RevId: 918624898

Author: release-please[bot]

pom.xml

@@ -6,7 +6,7 @@
   <groupId>com.google.genai</groupId>
   <artifactId>google-genai</artifactId>
   <name>google-genai</name>
-  <version>1.55.0-SNAPSHOT</version><!-- {x-version-update:google-genai:current} -->
+  <version>1.54.0-SNAPSHOT</version><!-- {x-version-update:google-genai:current} -->
   <packaging>jar</packaging>
   <description>
     Java idiomatic SDK for the Gemini Developer APIs and Vertex AI APIs.

src/main/java/com/google/genai/ApiClient.java

@@ -58,7 +58,7 @@
 public abstract class ApiClient implements AutoCloseable {
 
   // {x-version-update-start:google-genai:released}
-  private static final String SDK_VERSION = "1.54.0";
+  private static final String SDK_VERSION = "1.53.0";
   // {x-version-update-end:google-genai:released}
   private static final Logger logger = Logger.getLogger(ApiClient.class.getName());
 
@@ -656,9 +656,9 @@ private Optional<Map<String, String>> getTimeoutHeader(HttpOptions httpOptionsTo
    * Merges two user agent values, handling a special case for vertex-genai-modules.
    *
    * <p>Example:
-   * <li>val1 = google-genai-sdk/1.54.0 gl-java/22.0.2
-   * <li>val2 = vertex-genai-modules/1.54.0
-   * <li>Result: google-genai-sdk/1.54.0+vertex-genai-modules/1.2.3 gl-java/22.0.2
+   * <li>val1 = google-genai-sdk/1.42.0 gl-java/22.0.2
+   * <li>val2 = vertex-genai-modules/1.2.3
+   * <li>Result: google-genai-sdk/1.42.0+vertex-genai-modules/1.2.3 gl-java/22.0.2
    *
    * @param val1 The first value.
    * @param val2 The second value.