public PcodeOpAST getPreviousOpAt(int row) {
		return getRowObject(row).getPreviousPcodeOpAST();
	}
Returns the previous {@link PcodeOpAST} object at the specified row.
@param row row index
@return previous pcodeop
Ghidra/Features/BSimFeatureVisualizer/src/main/java/ghidra/bsfv/BsfvTableModel.java