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@financial-times/o-overlay lists no main file and has no index.js, so it can't be directly required. If this is a mistake, please let us know. It may however contain internal files that you can require manually:
require("@financial-times/o-brand/package.json"); // @financial-times/o-brand is a peer dependency.
require("@financial-times/o-colors/package.json"); // @financial-times/o-colors is a peer dependency.
require("@financial-times/o-icons/package.json"); // @financial-times/o-icons is a peer dependency.
require("@financial-times/o-normalise/package.json"); // @financial-times/o-normalise is a peer dependency.
require("@financial-times/o-spacing/package.json"); // @financial-times/o-spacing is a peer dependency.
require("@financial-times/o-typography/package.json"); // @financial-times/o-typography is a peer dependency.
require("@financial-times/o-viewport/package.json"); // @financial-times/o-viewport is a peer dependency.
require("@financial-times/o-visual-effects/package.json"); // @financial-times/o-visual-effects is a peer dependency.
// require("@financial-times/o-overlay/[??]")
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