Answer / Deepak Sahu

"Some important functions found in Ember packages include: 1) Object.create in ember-runtime/lib/system/core (a polyfill for Object.create). 2) compute, computed, observer, and property in ember-runtime/lib/computed (used for creating computed properties). 3) extend, mixin, and Ember.Object in ember-runtime/lib/object (provide class-like inheritance in JavaScript). Some functions found in ember-metal/lib/utils include: 1) isPresent and coerceToString (used for checking if a value is present and converting it to a string respectively). 2) ASCII case insensitive comparison functions such as startsWithCaseInsensitive, endsWithCaseInsensitive."

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