This is a function in Tcl's C interface. It returns a reference to a `[Tcl_Obj]` that holds the empty string. The reference will have a reference-count of zero; it is up to the caller to increment the reference count via `[Tcl_IncrRefCount]` (or delegate that to one of the reference-retaining operations in Tcl's C interface) or to ensure its destruction via `[Tcl_DecrRefCount]`.

The signature of this function should be treated as if it was:
======c
extern Tcl_Obj * Tcl_NewObj(void);
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