/// <summary>
/// Initializes a new instance of <see cref="ExpressionReference{TValue}"/> that points to the given node within the context of the given program.
/// </summary>
public ExpressionReference(VisualNode node)
{
isValue = false;
nodeId = node.Id;
value = default;
}
/// <summary>
/// Creates a new <see cref="StatementReference"/> by looking up the given node's key in the given program context.
/// </summary>
public StatementReference(VisualNode node)
{
nodeId = node.Id;
}
