Adds a lazily initialized property to the object

 E.G. require("lazy-property")(obj, name, init[, enumerable])
 obj is the object to add the property to
 name is the name of the property
 init is a function that computes the value of the property
 enumerable if the property is enumerable (default false)
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 This library is a dependency of npm, Node.js package manager.
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 Node.js is an event-based server-side JavaScript engine.