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<p>Constructs an EventsPublisher with a pointer to a NodeHandle <i>n</i>.</p>
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<p>Can be used in a multi-process mode by specifying the name of the mementar instance <i>name</i>. For classic use, <i>name</i> should be defined as "".</p>
<p>Inserts the event defined in the <i>event</i> object.</p>
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<p>The event can be stamped using the <i>stamp</i> parameter. If the stamp parameter is not set (set to default 0), it will be set at the current time.</p>
<p>Constructs an EventsSubscriber with a callback function <i>callback</i>.</p>
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<p>The EventsSubscriber constructor also takes a boolean option to automatically spin a thread. If you prefer not to use threads (and you want the EventsSubscriber to do the 'thread magic' behind the scenes), this is a good option for you.</p>
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<p>Can be used in a multi-process mode by specifying the name of the mementar instance <i>name</i>. For classic use, <i>name</i> should be defined as "".</p>
<p>Constructs an EventsSubscriber with a callback function <i>callback</i>.</p>
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<p>The EventsSubscriber constructor also takes a boolean option to automatically spin a thread. If you prefer not to use threads (and you want the EventsSubscriber to do the 'thread magic' behind the scenes), this is a good option for you.</p>
<p>Subscribe to the event pattern <i>pattern</i> defined as an Event object.</p>
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<p>A pattern can be constructed as a classic event, but each component of the triplet can also be set to the value "?" to represent anything.</p>
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<p>The <i>count</i> parameter defines the number of events corresponding to the model you want to know. By using the default value -1, the number of events is unlimited.</p>
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