private boolean isMouseOverHelpIcon(Point point, int columnIndex) {
		if (!canFindHelp()) {
			return false;
		}

		Rectangle headerRect = getHeaderRect(columnIndex);
		int padding = 2; // add some padding, since we are dealing with really small sizes
		int borderWidthTop = 2;
		int borderWidthRight = 4;
		int paddedHeight = HELP_ICON_HEIGHT + padding;
		int paddedWidth = paddedHeight;
		int headerEndX = headerRect.x + headerRect.width;
		int helpIconStartX = headerEndX - (paddedWidth + borderWidthRight);
		int hoverWidth = headerEndX - helpIconStartX;
		int hoverHeight = paddedHeight + borderWidthTop;
		Rectangle helpIconRect = new Rectangle(helpIconStartX, 0, hoverWidth, hoverHeight);
		return helpIconRect.contains(point);
	}
This is the cursor used by BasicTableHeaderUI to tell the user they can resize a column
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTableHeader.java