File "CommandMutex.php"
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<?php
namespace Illuminate\Console;
interface CommandMutex
{
    /**
     * Attempt to obtain a command mutex for the given command.
     *
     * @param  \Illuminate\Console\Command  $command
     * @return bool
     */
    public function create($command);
    /**
     * Determine if a command mutex exists for the given command.
     *
     * @param  \Illuminate\Console\Command  $command
     * @return bool
     */
    public function exists($command);
    /**
     * Release the mutex for the given command.
     *
     * @param  \Illuminate\Console\Command  $command
     * @return bool
     */
    public function forget($command);
}