I changed control file

debian/control

@@ -18,5 +18,10 @@ Depends:
  ${misc:Depends}
  , nodejs
 Description: Detect whether a value is an error
+ Example : var isError = require("is-error");
+ .
+ console.log(isError(new Error('hi'))) // true
+ .
+ console.log(isError({ message: 'hi' })) // false
  .
  Node.js is an event-based server-side JavaScript engine.