public static JdbiExtension h2() {
        return JdbiH2Extension.instance();
    }
Creates a new extension using the H2 database. Each call to this method creates a new database which is transient and in-memory. Using this method
requires the <code>com.h2database:h2</code> component on the classpath.

<pre>{@code
    @RegisterExtension
    public JdbiExtension h2 = JdbiExtension.h2();
}</pre>

@return A {@link JdbiExtension} connected to a managed h2 data source.
@see JdbiH2Extension
testing/src/main/java/org/jdbi/v3/testing/junit5/JdbiExtension.java