function isEndOfArrowBlock(lastToken) {
			if (!astUtils.isClosingBraceToken(lastToken)) {
				return false;
			}
			const node = sourceCode.getNodeByRangeIndex(lastToken.range[0]);

			return (
				node.type === "BlockStatement" &&
				node.parent.type === "ArrowFunctionExpression"
			);
		}
Check whether a given token is the closing brace of an arrow function.
@param {Token} lastToken A token to check.
@returns {boolean} `true` if the token is the closing brace of an arrow function.