title: Global extension function in kotlin
body: <p>Hey I want to make a class in kotlin that will hold all extension functions that I will use in a few places for example:</p>
  
  <pre><code>class DateUtils {
      //in this case I use jodatime
      fun Long.toDateTime() : DateTime = DateTime(this)
      fun String.toDateTime() : DateTime = DateTime.parse(this)
  }
  
  
  class SomeClassWithNoConnectionToDateUtils {
      fun handleDataFromServer(startDate: String) {
          someOtherFunction()
          //startDate knows about toDateTime function in DateUtils 
          startDate.toDateTime().plusDays(4)
      }
  }
  </code></pre>
  
  <p>Is there a way to perform such operation </p>