1 | module.exports = function (target, lookup, checkUpdated) {
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2 | target.keys = function () {
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3 | checkUpdated && checkUpdated()
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4 | return Object.keys(lookup)
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5 | }
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6 |
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7 | target.get = function (key) {
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8 | checkUpdated && checkUpdated()
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9 | return lookup[key]
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10 | }
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11 |
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12 | target.has = function (key) {
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13 | checkUpdated && checkUpdated()
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14 | return key in lookup
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15 | }
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16 | }
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