Branch is a CST node that can have children.

Leaf nodes are part of the cst that cannot have child nodes, they represent a single token from the input.

NodeBase implements the non-fragment parts of the Node interface.

Source represents a source file.

A Token represents the smallest consumed unit input.

Fragment is a component of a cst that is backed by a token.

Node is a Fragment in a cst that represents unskipped tokens.

Separator is a list type to manage fragments that were skipped.