ipc-messenger.js
function(pack) {
    if (pack.toSource !== false || pack.source !== process.pid) {
      CALLBACK(pack.message)
    }
  }
function(pack) {
    if (pack.toSource !== false || pack.source !== process.pid) {
      CALLBACK(pack.message)
    }
  }
function ( pack ) { if ( pack . toSource !== false || pack . source !== process . pid ) { CALLBACK ( pack . message ) } }
Message receiver of the workers
Message receiver of the workers