I try to execute following script
import hudson.model.*
import hudson.util.*
import hudson.scm.*
import hudson.scm.SubversionChangeLogSet.LogEntry

// work with current build
def build = Thread.currentThread()?.executable

// for testing, use last build or specific build number
//def item = hudson.model.Hudson.instance.getItem("Update_SRC_Branch")
//def build = item.getLastBuild()
//def build = item.getBuildByNumber(35)

// get ChangesSets with all changed items
def changeSet= build.getChangeSet()
List<LogEntry> items = changeSet.getItems()

and got error
startup failed:
Script1.groovy: 4: unable to resolve class hudson.scm.SubversionChangeLogSet.LogEntry
@ line 4, column 1.
import hudson.scm.SubversionChangeLogSet.LogEntry
^