flyway_schema_history.execution_time unit?

Hi, I am just wondering what is the unit of the execution_time column in the flyway_schema_history table?

I assume it is milliseconds from reading some of the source code, but it is not clearly stated anywhere what the unit is for the value stored in the table.

I saw this post : flyway_schema_history execution_time unit? – Support, but the question was not clearly answered.