| StartBlock | Begins a block of flow items |
| StartBlock(Direction) | Begins a block of flow items |
| StartBlock(FlowMode) | Begins a block of flow items |
| StartBlock(FuncBoolean) | Begins a block of flow items |
| StartBlock(FlowMode, Direction) | Begins a block of flow items |
| StartBlock(FuncBoolean, Direction) | Begins a block of flow items |
| StartBlock(FuncBoolean, FlowMode) | Begins a block of flow items |
| StartBlock(FuncBoolean, FlowMode, Direction) | Begins a block of flow items |