The twin of the builtInMemory but with less built ins defined for cases in which we want some commonly overwritten variables to remain open. If you do not know if you need the empty environment, you do not need the empty environment (right now).
What the configuration states about the exports of packages R does not attach on startup, by package and then bare name; not in builtInMemory, they enter an analysis only once attached, see BuiltIns.forPackage.
What flowR states about pkg's exports, undefined when it states nothing (attaching brings these into scope).
Register a built-in constant (like NULL or TRUE) to the given BuiltIns
Register a single BuiltInDefinition to the given memories in BuiltIns
Register a built-in function (like print or c) to the given BuiltIns
Registers all combinations of replacements
Registers definition under identifier. A namespace R does not attach by default lands in
packageMemory instead of the always-on environment.
Optionalnamespace: string
The built-in environment is the root of all environments.
For its default content (when not overwritten by a flowR config), see the DefaultBuiltinConfig.