src/FBAInboundServiceMWS/Model/ASINPrepInstructionsList.php
public function setASINPrepInstructions($value)
    {
        if (!$this->_isNumericArray($value)) {
            $value = array($value);
        }
        $this->_fields['ASINPrepInstructions']['FieldValue'] = $value;
        return $this;
    }
public function setASINPrepInstructions($value)
    {
        if (!$this->_isNumericArray($value)) {
            $value = array($value);
        }
        $this->_fields['ASINPrepInstructions']['FieldValue'] = $value;
        return $this;
    }
Set the value of the ASINPrepInstructions property.

@param array $value
@return $this This instance