         java.lang.String&nbsp;sha256hash,
               long&nbsp;expectedByteLen,
               java.lang.String&nbsp;senderCallsign)</code>
<div class="block">A new MP download request was received with the given details;  the 
 ReceiveInitiator should set set the system up to receive the MP
 and return an MPReceiver that will handle the download.</div>
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