A node statement in a dot graph.
Creates a new node statement.
The ID of the node.
The list of attributes of the node.
Adds an attribute to the attribute list of the node.
The key of the attribute.
The value of the attribute.
This node statement, for chaining.
Adds multiple attributes to the attribute list of the node.
The attributes to add.
Converts the node statement to a dot string.
Whether the graph is directed (unused).
The number of spaces to indent.
The dot string of the node statement.
A node statement in a dot graph.