[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.md 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.