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node_modules/webpack/lib/util/create-schema-validation.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const memoize = require("./memoize");
+
+const getValidate = memoize(() => require("schema-utils").validate);
+
+const createSchemaValidation = (check, getSchema, options) => {
+	getSchema = memoize(getSchema);
+	return value => {
+		if (check && !check(value)) {
+			getValidate()(getSchema(), value, options);
+			if (check) {
+				require("util").deprecate(
+					() => {},
+					"webpack bug: Pre-compiled schema reports error while real schema is happy. This has performance drawbacks.",
+					"DEP_WEBPACK_PRE_COMPILED_SCHEMA_INVALID"
+				)();
+			}
+		}
+	};
+};
+
+module.exports = createSchemaValidation;