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google.setOnLoadCallback(function(){
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       data.addColumn('number', 'DL数');
       data.addColumn('number', 'Googleセルラン');
       data.addColumn('number', 'iOSセルラン');
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['2020-07-03',null,74,109,null,null],
['2020-07-04',null,74,88,null,null],
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    series: {
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    tooltip: { trigger: 'both' },
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});