Extension functions

The common and utility functions are grouped in a file named Extension.kt (you can specify any name you want). It contains top-level functions that can be used anywhere in the project.

Complete the Extension.kt file:

    /**
     * Builds the insert query for the specified message
     */
     fun insertQuery(m: Message): Messages.(UpdateBuilder<*>) -> Unit =   
    {
      if (m.id != null) it[id] = m.id
      it[content] = m.content
      it[location] = m.location
    }

    /**
     * Create the message object from Result row
     * @return message
     */
     fun ResultRow.getMessage() =
      Message(this[Messages.content], this[Messages.location],   
      this[Messages.id])

    // Other extension functions