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The Checker Framework enhances Java’s type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.javacutil;

/**
 * An implementation of the ErrorHandler interface can be registered
 * with the ErrorReporter class to change the default behavior on
 * errors.
 */
public interface ErrorHandler {

    /**
     * Log an error message and abort processing.
     *
     * @param msg the error message to log
     */
    public void errorAbort(String msg);

    public void errorAbort(String msg, Throwable cause);
}