package net.minecraft.server; public final class RunningOnDifferentThreadException extends RuntimeException { public static final RunningOnDifferentThreadException RUNNING_ON_DIFFERENT_THREAD = new RunningOnDifferentThreadException(); private RunningOnDifferentThreadException() { this.setStackTrace(new StackTraceElement[0]); } public synchronized Throwable fillInStackTrace() { this.setStackTrace(new StackTraceElement[0]); return this; } }