performs type checking for itself and sub-nodes
()
| 21 | Position() Pos // byte position of start of node in full original input string |
| 22 | Check(*Tree) error // performs type checking for itself and sub-nodes |
| 23 | Return() ReturnType |
| 24 | |
| 25 | // Make sure only functions in this package can create Nodes. |
| 26 | unexported() |
no outgoing calls