app/code/community/Adyen/Fee/Model/Tax/Config.php
public function paymentFeePriceIncludesTax($store = null)
    {
        if ($this->_paymentFeePriceIncludeTax === null) {
            $this->_paymentFeePriceIncludeTax = (bool)$this->_getConfigDataCall(
                self::CONFIG_XML_PATH_PAYMENT_FEE_INCLUDES_TAX,
                $store
            );
        }

        return $this->_paymentFeePriceIncludeTax;
    }
public function paymentFeePriceIncludesTax($store = null)
    {
        if ($this->_paymentFeePriceIncludeTax === null) {
            $this->_paymentFeePriceIncludeTax = (bool)$this->_getConfigDataCall(
                self::CONFIG_XML_PATH_PAYMENT_FEE_INCLUDES_TAX,
                $store
            );
        }

        return $this->_paymentFeePriceIncludeTax;
    }
public function paymentFeePriceIncludesTax ( $ store = null ) { if ( $ this -> _paymentFeePriceIncludeTax === null ) { $ this -> _paymentFeePriceIncludeTax = ( bool ) $ this -> _getConfigDataCall ( self :: CONFIG_XML_PATH_PAYMENT_FEE_INCLUDES_TAX , $ store ) ; } return $ this -> _paymentFeePriceIncludeTax ; }
Check if payment fee prices include tax

@param   store $store
@return  bool
Check if payment fee prices include tax