contract
fun contract( lBracket: Node.Keyword.LBracket = Node.Keyword.LBracket(), contractEffects: List<Node.Expression> = listOf(), rBracket: Node.Keyword.RBracket = Node.Keyword.RBracket(), supplement: NodeSupplement = NodeSupplement()): Node.PostModifier.Contract
Creates a new Node.PostModifier.Contract instance.