| add_class | Prepend a class to the class vector | 
| are_composable | Check if two functions are composable | 
| basic_functions | Basic functions | 
| cache_functions | Cache functions | 
| classcheck | Check the htype | 
| compose | Make composition of functions | 
| connect | Connect nodes into a pipeline | 
| default_fun | Create a default (NULL returning) function for a given type | 
| default_inode | Create a default inode object for a given type | 
| hnode_setters | Get and set elements of an hnode | 
| is_function | is.* functions for checking classes | 
| make_cacher | Create a caching function | 
| make_effector | Create a new effector function | 
| make_validator | Create a new validator | 
| nformals | Get number of formal arguments | 
| node | Build function | 
| npositional | Get number of formal positional arguments | 
| pied | pied: A typed monadic pipeline | 
| runall | Run functions for their side effects | 
| type | Access, set, and print function types | 
| unify | Collapse all arguments into unary closure | 
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