src/main/java/com/github/gquintana/metrics/sql/MetricHelper.java
public Timer.Context startPreparedStatementLifeTimer(Query query) {
        ensureSqlId(query);
        String name = metricNamingStrategy.getPreparedStatementLifeTimer(query.getSql(), query.getSqlId());
        return startTimer(name);
    }
public Timer.Context startPreparedStatementLifeTimer(Query query) {
        ensureSqlId(query);
        String name = metricNamingStrategy.getPreparedStatementLifeTimer(query.getSql(), query.getSqlId());
        return startTimer(name);
    }
Start Timer when prepared statement is created

@return Started timer context or null