Create an AST node of type stack. A stack, represented by its top block, is the set of all blocks connected to a top block, including the top block.
A top block has no parent and can be found in the list returned by workspace.getTopBlocks().
An AST node of type stack that points to the top block on the stack.
Create an AST node of type stack. A stack, represented by its top block, is the set of all blocks connected to a top block, including the top block.