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- /**
- * Normalize an identifier (as found in references, definitions).
- *
- * Collapses markdown whitespace, trim, and then lower- and uppercase.
- *
- * Some characters are considered “uppercase”, such as U+03F4 (`ϴ`), but if their
- * lowercase counterpart (U+03B8 (`θ`)) is uppercased will result in a different
- * uppercase character (U+0398 (`Θ`)).
- * So, to get a canonical form, we perform both lower- and uppercase.
- *
- * Using uppercase last makes sure keys will never interact with default
- * prototypal values (such as `constructor`): nothing in the prototype of
- * `Object` is uppercase.
- *
- * @param {string} value
- * Identifier to normalize.
- * @returns {string}
- * Normalized identifier.
- */
- export function normalizeIdentifier(value: string): string
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