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diff --git a/app/assets/javascripts/lib/utils/table_utility.js b/app/assets/javascripts/lib/utils/table_utility.js
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index 00000000000..33db7686e0f
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+++ b/app/assets/javascripts/lib/utils/table_utility.js
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+import { DEFAULT_TH_CLASSES } from './constants';
+
+/**
+ * Generates the table header classes to be used for GlTable fields.
+ *
+ * @param {Number} width - The column width as a percentage.
+ * @returns {String} The classes to be used in GlTable fields object.
+ */
+export const thWidthClass = (width) => `gl-w-${width}p ${DEFAULT_TH_CLASSES}`;