Groovy filterLine() not working in Scriptler

[Sverre Moe]

Running the follow code in "Execute Groovy script" works:

final def project = buildConfigurationFile.filterLine {

    it.startsWith(projectLine)

}.toString().normalize()

However when I add the script in Scriptler and run it in "Scriptler script" it fails. Why is that?

Could it be a different version of Groovy between Scriptler Plugin and Groovy Plugin?

Execution of script [build-properties.groovy] failed - org.jenkinsci.plugins.scriptler.util.GroovyScript$ScriptlerExecutionException: groovy.lang.MissingMethodException: No signature of method: sun.nio.fs.UnixPath.filterLine() is applicable for argument types: (Script1$_run_closure1) values: [Script1$_run_closure1@71f7d5d0]hudson.remoting.ProxyException: org.jenkinsci.plugins.scriptler.util.GroovyScript$ScriptlerExecutionException: groovy.lang.MissingMethodException: No signature of method: sun.nio.fs.UnixPath.filterLine() is applicable for argument types: (Script1$_run_closure1) values: [Script1$_run_closure1@71f7d5d0]
	at org.jenkinsci.plugins.scriptler.util.GroovyScript.call(GroovyScript.java:131)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:326)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
	at ......remote call to alya(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1413)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:778)
	at org.jenkinsci.plugins.scriptler.builder.ScriptlerBuilder.perform(ScriptlerBuilder.java:116)
	at hudson.plugins.templateproject.ProxyBuilder.perform(ProxyBuilder.java:115)
	at hudson.plugins.templateproject.ProxyBuilder.perform(ProxyBuilder.java:115)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785)
	at hudson.model.Build$BuildExecution.build(Build.java:205)
	at hudson.model.Build$BuildExecution.doRun(Build.java:162)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:537)
	at hudson.model.Run.execute(Run.java:1741)
	at hudson.matrix.MatrixRun.run(MatrixRun.java:146)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:410)
Caused by: hudson.remoting.ProxyException: groovy.lang.MissingMethodException: No signature of method: sun.nio.fs.UnixPath.filterLine() is applicable for argument types: (Script1$_run_closure1) values: [Script1$_run_closure1@71f7d5d0]
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
	at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
	at Script1.run(Script1.groovy:83)
	at org.jenkinsci.plugins.scriptler.util.GroovyScript.call(GroovyScript.java:122)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:326)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)