function isStarredBlockComment([firstComment]) {
			if (firstComment.type !== "Block") {
				return false;
			}

			const lines = firstComment.value.split(astUtils.LINEBREAK_MATCHER);

			// The first and last lines can only contain whitespace.
			return (
				lines.length > 0 &&
				lines.every((line, i) =>
					(i === 0 || i === lines.length - 1
						? /^\s*$/u
						: /^\s*\*/u
					).test(line),
				)
			);
		}
Checks if a comment group is in starred-block form.
@param {Token[]} commentGroup A group of comments, containing either multiple line comments or a single block comment.
@returns {boolean} Whether or not the comment group is in starred block form.