code: public final void makeLine(final Map<String, Object> pReqVars,
      final L pLine, final AccSettings pAs,
        final TaxDestination pTxRules) throws Exception {
      this.utlInvBase
        .makeLine(pReqVars, pLine, pAs, pTxRules, this.invTxMeth, this);
    }
docs: <p>Makes invoice line's taxes, totals.</p>
  @param pReqVars request scoped vars
  @param pLine invoice line
  @param pAs Accounting Settings
  @param pTxRules NULL if not taxable
  @throws Exception - an exception.