public int endBlock() {
		if (--nestingLevel < 0) {
			applicator.appendLogMsg("Block Nesting went negative for ending block that began at " +
				currentBlockAddress);
		}
		if (nestingLevel == 0) {
			//currentFunctionSymbolApplier = null;
		}
		return nestingLevel;
	}
Manages block nesting for function-related symbols
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/BlockNestingContext.java