function isLexicalDeclaration(node) {
			switch (node.type) {
				case "FunctionDeclaration":
				case "ClassDeclaration":
					return true;
				case "VariableDeclaration":
					return node.kind !== "var";
				default:
					return false;
			}
		}
Checks whether or not a node is a lexical declaration.
@param {ASTNode} node A direct child statement of a switch case.
@returns {boolean} Whether or not the node is a lexical declaration.