src/Data/BizField.php
public function getDefaultValue()
    {
        if ($this->defaultValue !== null) {
            return Expression::evaluateExpression($this->defaultValue, $this->getDataObj());
        }
        return "";
    }
public function getDefaultValue()
    {
        if ($this->defaultValue !== null) {
            return Expression::evaluateExpression($this->defaultValue, $this->getDataObj());
        }
        return "";
    }
Get default value of the field

@return string the default value of the field