function isConstructorFunction(node) {
	return (
		node.type === "FunctionExpression" &&
		node.parent.type === "MethodDefinition" &&
		node.parent.kind === "constructor"
	);
}
Checks whether or not a given node is a constructor.
@param {ASTNode} node A node to check. This node type is one of
  `Program`, `FunctionDeclaration`, `FunctionExpression`, and
  `ArrowFunctionExpression`.
@returns {boolean} `true` if the node is a constructor.