function checkSpacingAroundTokenBefore(node) {
			if (node) {
				const token = sourceCode.getTokenBefore(
					node,
					astUtils.isKeywordToken,
				);

				checkSpacingAround(token);
			}
		}
Reports the previous token of a given node if the token is a keyword and
usage of spacing around the token is invalid.
@param {ASTNode|null} node A node to report.
@returns {void}