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'use strict';
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module.exports = function sanitizeProjection(projection) {
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if (projection == null) {
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return;
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}
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const keys = Object.keys(projection);
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for (let i = 0; i < keys.length; ++i) {
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if (typeof projection[keys[i]] === 'string') {
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projection[keys[i]] = 1;
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}
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}
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};
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