Download com.buildkite.test-collector-android.unit-test-collector-plugin : com.buildkite.test-collector-android.unit-test-collector-plugin.gradle.plugin JAR file - All Versions:
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window com.buildkite.test-collector-android.unit-test-collector-plugin.gradle.plugin-0.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.