Jackalope\NodeType\NodeType::canSetProperty PHP Method

    public function canSetProperty($propertyName, $value, $throw = false)
    {
        $propDefs = $this->getPropertyDefinitions();
        try {
            $type = $this->valueConverter->determineType($value);
        } catch (ValueFormatException $e) {
            if ($throw) {
                throw new ValueFormatException(sprintf('Invalid value for property "%s": %s', $propertyName, $e->getMessage()), $e->getCode(), $e);
            }
            return false;
        }
        // check explicit matches first and keep wildcard definitions for later
        $wildcards = array();
        foreach ($propDefs as $prop) {
            if ('*' === $prop->getName()) {
                $wildcards[] = $prop;
            } elseif ($propertyName == $prop->getName()) {
                if (is_array($value) !== $prop->isMultiple()) {
                    if ($prop->isMultiple()) {
                        throw new ConstraintViolationException("The property definition is multivalued, but the value '{$value}' is not.");
                    }
                    if (is_array($value)) {
                        throw new ConstraintViolationException("The value {$value} is multivalued, but the property definition is not.");
                    }
                }
                $requiredType = $prop->getRequiredType();
                if (PropertyType::UNDEFINED === $requiredType || $type === $requiredType) {
                    return true;
                }
                // try if we can convert. OPTIMIZE: would be nice to know without actually attempting to convert
                try {
                    $this->valueConverter->convertType($value, $prop->getRequiredType(), $type);
                    return true;
                } catch (ValueFormatException $e) {
                    // fall through and return false
                }
                if ($throw) {
                    throw new ConstraintViolationException("The property '{$propertyName}' with value '{$value}' can't be converted to an existing type.");
                }
                return false;
                // if there is an explicit match, it has to fit
            }
        }
        // now check if any of the wildcards matches
        /** @var $prop PropertyDefinition */
        foreach ($wildcards as $prop) {
            if (is_array($value) != $prop->isMultiple()) {
                continue;
            }
            $requiredType = $prop->getRequiredType();
            if (PropertyType::UNDEFINED === $requiredType || $type === $requiredType) {
                return true;
            }
            // try if we can convert. OPTIMIZE: would be nice to know without actually attempting to convert
            try {
                $this->valueConverter->convertType($value, $prop->getRequiredType(), $type);
                return true;
            } catch (ValueFormatException $e) {
                if ($throw) {
                    throw new ValueFormatException($propertyName . ': ' . $e->getMessage(), $e->getCode(), $e);
                }
                return false;
                // if there is an explicit match, it has to fit
            }
        }
        if ($throw) {
            $val = is_object($value) ? get_class($value) : (is_scalar($value) ? (string) $value : gettype($value));
            throw new ConstraintViolationException("Node type definition does not allow to set the property with name '{$propertyName}' and value '{$val}'");
        }
        return false;
    }