normalizeFunctionSignature

Parsed documentation:
View on GitHub
/**
* Normalizes the signature of custom functions to make it possible to just supply the
* function name and have the signature default to `fn(...)`. The callback is adjusted
* to transform the input sass list into discrete arguments.
*
* @param {String} signature
* @param {Function} callback
* @return {Object}
* @api private
*/
Suggestions:
Please help! Open an issue on GitHub if this assessment is incorrect.