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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.dataflow.cfg.block;

import org.checkerframework.dataflow.analysis.Store;
import org.checkerframework.dataflow.cfg.node.Node;

/**
 * Represents a conditional basic block that contains exactly one boolean
 * {@link Node}.
 *
 * @author Stefan Heule
 *
 */
public interface ConditionalBlock extends Block {

    /**
     * @return the entry block of the then branch
     */
    Block getThenSuccessor();

    /**
     * @return the entry block of the else branch
     */
    Block getElseSuccessor();

    /**
     * @return the flow rule for information flowing from
     * this block to its then successor
     */
    Store.FlowRule getThenFlowRule();

    /**
     * @return the flow rule for information flowing from
     * this block to its else successor
     */
    Store.FlowRule getElseFlowRule();

    /**
     * Set the flow rule for information flowing from this block to
     * its then successor.
     */
    void setThenFlowRule(Store.FlowRule rule);

    /**
     * Set the flow rule for information flowing from this block to
     * its else successor.
     */
    void setElseFlowRule(Store.FlowRule rule);
}