private Variable[] getPositiveVariables() {
		if (variables.isEmpty()) {
			return emptyArray;
		}
		int length = variables.size();
		// find the end of the negatives
		int index = 0;
		for (index = 0; index < length; index++) {
			Variable var = variables.get(index);
			if (var.getDataType().isDeleted()) {
				variables.remove(index);
				continue;
			}
			int start = var.getStackOffset();
			if (start >= 0 && start >= paramStart) {
				break;
			}
		}
		if (index == length) {
			return emptyArray;
		}
		List<Variable> vars = variables.subList(index, length);
		return vars.toArray(emptyArray);
	}
Get all the stack variables in the positive portion of the stack.
This EXCLUDES any variables defined before the parameter offset if the
parameter offset is positive.

@return an array of variables defined on the positive portion of the frame.
Ghidra/Features/Base/src/main/java/ghidra/util/StackFrameImpl.java