src/js/commands/instrument.js
function accumulateData(chunk, enc, cb) {
            this.data = this.data == null ? chunk : Buffer.concat([this.data,chunk]);;
            cb();
        }
function accumulateData(chunk, enc, cb) {
            this.data = this.data == null ? chunk : Buffer.concat([this.data,chunk]);;
            cb();
        }
function accumulateData ( chunk , enc , cb ) { this . data = this . data == null ? chunk : Buffer . concat ( [ this . data , chunk ] ) ; ; cb ( ) ; }
shared between HTMLRewriteStream and InstrumentJSStream
shared between HTMLRewriteStream and InstrumentJSStream