All functions
boolean_fill	Fill a nested logical list with TRUEs before or after the first TRUE
compare_stage_keys	Compare two stage keys to see which one has a stage run first
copy_env	Copy one environment into another recursively.
is_pre_stagerunner	Whether or not an object can be transformed into a stageRunner.
is.stagerunner is.stageRunner	Check whether an R object is a stageRunner object
nested_names	Delimited names of a nested list.
normalize_stage_keys	Normalize a reference to stage keys
OOP_type_independent_method	Call a method on an object regardless of its OOP type.
run	Run the stages in a stageRunner object.
show_message	Show a progress message when executing a stagerunner.
special_and_lists	AND two lists together with some regards for nesting
special_or_lists	OR two lists together with some regards for nesting
stageRunner_.before_env	Get an environment representing the context directly before executing a given stage.
stageRunner_.clear_cache	Clear all caches in this stageRunner, and recursively.
stageRunner_.mark_finished	Mark a given stage as being finished.
stageRunner_.root	Determine the root of the stageRunner.
stageRunner_.set_parents	Set all parents for this stageRunner, and recursively
stageRunner_.set_prefixes	Set all prefixes for child stageRunners.
stageRunner_append	Append one stageRunner to the end of another.
stageRunner_around	Wrap a function around a stageRunner's terminal nodes
stageRunner_coalesce	Coalescing a stageRunner object is taking another stageRunner object with similar stage names and replacing the latter's cached environments with the former's.
stageRunner_current_stage	This allows us to get the furthest executed stage.
stageRunner_has_key	Whether or not the stageRunner has a key matching this input.
stagerunner_initialize	Initialize a stageRunner object.
stageRunner_next_stage	For stageRunners with caching, find the next unexecuted stage.
stageRunner_overlay	Overlaying a stageRunner object is taking another stageRunner object with similar stage names and adding the latter's stages as terminal stages to the former (for example, to support tests).
stageRunner_show	Generic for printing stageRunner objects.
stageRunner_stage_names	Retrieve a flattened list of canonical stage names for a stageRunner object
stageRunner_transform	Transform the callable's of the terminal nodes of a stageRunner.
stageRunner stagerunner	Stagerunners are parametrized sequences of linear execution.
stageRunnerNode_around	Wrap a stageRunnerNode callable with another callable.
stageRunnerNode_overlay	Append one stageRunnerNode around another.
stageRunnerNode_run	Execute the callable of a stageRunnerNode.
stageRunnerNode_transform	Transform a stageRunnerNode according to a functional.
is.stageRunnerNode	Stagerunner nodes are environment wrappers around individual stages (i.e. functions) in order to track meta-data (e.g., for caching).
treeSkeleton__.parent_index	Find the index of the current object in the children of its parent.
treeSkeleton__children	Find the children of the current object wrapped in treeSkeletons.
treeSkeleton__find	Find the key with the given index using the names of the lists that parametrize each node's children.
treeSkeleton__first_leaf	Find the first leaf in a tree.
treeSkeleton__initialize	Initialize a treeSkeleton object.
treeSkeleton__last_leaf	Find the last leaf in a tree.
treeSkeleton__parent	Find the parent of the current object wrapped in a treeSkeleton.
treeSkeleton__predecessor	Attempt to find the predecessor of the current node.
treeSkeleton__root	Find the root node of the tree (the only one with no parent).
treeSkeleton__successor	Attempt to find the successor of the current node.
treeSkeleton	This class implements iterators for a tree-based structure without an actual underlying tree.