protected PcodeUseropLibrary<T> createThreadStubLibrary() {
		return new DefaultPcodeThread.PcodeEmulationLibrary<T>(null);
	}
A factory method to create a stub library for compiling thread-local Sleigh source

<p>
Because threads may introduce p-code userops using libraries unique to that thread, it
becomes necessary to at least export stub symbols, so that p-code programs can be compiled
from Sleigh source before the thread has necessarily been created. A side effect of this
strategy is that all threads, though they may have independent libraries, must export
identically-named symbols.

@return the stub library for all threads
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/AbstractPcodeMachine.java