private int getNegativeSize() {
		int paramStart = getParameterOffset();
		if (variables.isEmpty()) {
			return (growsNegative() ? 0 : -paramStart);
		}

		Variable var = variables.get(0);
		int stackOffset = var.getStackOffset();
		if (stackOffset >= 0) {
			return (growsNegative() ? 0 : -paramStart);
		}
		return 0 - stackOffset;
	}
Get the size of the negative portion of the stack

@return the negative portion size
Ghidra/Features/Base/src/main/java/ghidra/util/StackFrameImpl.java