boolean isParameter() {
			int paramStart = getParameterOffset();
			int stackOffset = getOffset();
			return (growsNegative && stackOffset >= paramStart) ||
				(!growsNegative && stackOffset < paramStart);
		}
{@return true if this component corresponds to a function parameter}
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/stackeditor/StackFrameDataType.java