Cannot build IDEA plugin

[Weijun Wang]

Error:(64, 8) java: com.oracle.plugin.jtreg.configuration.JTRegConfiguration is not abstract and does not override abstract method isConfiguredByElement(com.intellij.psi.PsiElement) in com.intellij.execution.JavaTestConfigurationBase

Ctrl-I adds

@Override
public void bePatternConfiguration(List<PsiClass> list, PsiMethod psiMethod) {
    
}

@Override
public void beMethodConfiguration(Location<PsiMethod> location) {

}

@Override
public void beClassConfiguration(PsiClass psiClass) {

}

@Override
public boolean isConfiguredByElement(PsiElement psiElement) {
    return false;
}

but I don't know how to implement. If I just build, the plugin can be installed but the settings pane shows a loading wheel and never loads. If I want to run a jtreg test, I see "Error running 'BadName.java': No jtreg path configured".

Letting isConfiguredByElement() returning true does not help.

I'm using

IntelliJ IDEA 2017.2.6
Build #IC-172.4574.11, built on November 14, 2017
JRE: 1.8.0_152-release-915-b12 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.13.1

Thanks
Max