static JdbcDatabaseContainer getContainer(String jdbcUrl) {
        synchronized (jdbcUrlContainerCache) {
            return jdbcUrlContainerCache.get(jdbcUrl);
        }
    }
Utility method to get an instance of a database container given its JDBC URL.

@param jdbcUrl the JDBC URL of the container instance to get
@return an instance of database container or <code>null</code> if no container associated with JDBC URL
modules/jdbc/src/main/java/org/testcontainers/jdbc/ContainerDatabaseDriver.java