[AnimationTree] node resource that contains many blend type nodes. This node may contain a sub-tree of any other blend type nodes, such as [AnimationNodeTransition], [AnimationNodeBlend2], [AnimationNodeBlend3], [AnimationNodeOneShot], etc. This is one of the most commonly used roots. An [AnimationNodeOutput] node named [code]output[/code] is created by default. $DOCS_URL/tutorials/animation/animation_tree.html Adds an [AnimationNode] at the given [param position]. The [param name] is used to identify the created sub-node later. Connects the output of an [AnimationNode] as input for another [AnimationNode], at the input port specified by [param input_index]. Disconnects the node connected to the specified input. Returns the sub-node with the specified [param name]. Returns the position of the sub-node with the specified [param name]. Returns [code]true[/code] if a sub-node with specified [param name] exists. Removes a sub-node. Changes the name of a sub-node. Modifies the position of a sub-node. The global offset of all sub-nodes. The connection was successful. The input node is [code]null[/code]. The specified input port is out of range. The output node is [code]null[/code]. Input and output nodes are the same. The specified connection already exists.