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isa-stream

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Ducktype if something is a Node.js compatible stream

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isa-stream ---------- Ducktype stream matching, lets you check objects for stream identity without worrying if they're a Node.js stream object or a readable-stream. Usage ----- ```javascript var isaStream = require('isa-stream'); if (isaStream.Readable(mystream)) { ... } ``` Details ------- Provides Readable, Writable and Duplex matchers.