Returns true if content is set

@return bool
505592
public function hasContent(): bool
    {
        $body = $this->get('body');
        return !is_null($body) && strlen((string) $body);
    }
856052
public function isTabbed()
    {
        $ident    = $this->ident();
        $metadata = $this->adminSecondaryMenu();

        if (isset($metadata[$ident])) {
            return $this->hasLinks() ||
                   $this->hasGroups() ||
                   $this->hasActions();
        }

        return false;
    }
364599
public function hasContent(?string $contentType = null, ?string $contentKey = null): bool
    {
        return isset($this->content[$contentType][$contentKey]);
    }
855724
public function isLast()
    {
        $node = $this->node;
        return $node->index === 'content'
            || isset($node->position) && $node->position === $node->arr->_listLength;
    }
578835
public final function verifySetData(){

        foreach($this->data as $k => $v){
            $this->verifyData($k);
        }//foreach

        if(count($this->errors)){
            return false;
        }//if

        return true;

    }
382668
function hasNext()
    {
        if (isset($this->_limit) && $this->offset >= $this->_limit)
        {
            return false;
        }
    
        if (!isset($this->data))
        {
            $this->loadNextPage();
        }

        if ($this->pos < sizeof($this->data))
        {
            return true;
        }

        if (!$this->truncated)
        {
            return false;            
        }
        
        $this->loadNextPage();
        return $this->pos < sizeof($this->data);        
    }
1172991
protected function isHTML()
    {
        if (function_exists('headers_list') && $headers = headers_list())
        {
            foreach ((array) $headers as $header)
            {
                $header = strtolower($header);

                if (strpos($header, 'content-type:') === 0 && !strpos($header, 'text/html'))
                {
                    return false;
                }
            }
        }

        return true;
    }
1144614
public function __isset($name) {

        if (isset($this->_writeProperties[$name])) {
            
            return true;
        }

        return isset($this->_readProperties[$name]);
    }
19139
public function isContentShown($isFirst = false, $isMiddle = false, $isLast = false)
    {
        return $this->isShown('Content', $isFirst, $isMiddle, $isLast);
    }
1093992
public function __isset(string $name): bool
    {
        $setter = [$this, 'set' . strtolower($name)];
        $getter = [$this, 'get' . strtolower($name)];

        return is_callable($setter) || is_callable($getter);
    }
459676
public function __isset($name)
    {
        foreach ($this->values as $valueObject) {
            if ($valueObject->getAttribute()->getName() == $name) {
                return true;
            }
        }

        return false;
    }
1109469
public function containsData()
    {
        if (!isset($this->Data["Series"])) {
            return false;
        }

        foreach (array_keys($this->Data["Series"]) as $Key) {
            if ($this->Data["Abscissa"] != $Key
                && $this->Data["Series"][$Key]["isDrawable"] == true
            ) {
                return true;
            }
        }

        return null;
    }
582162
public function isSettingSet( string $name ): bool
	{
		return isset($this->settings[$name]) && !is_null($this->settings[$name]);
	}
145474
public function isHit()
    {
        if ($this->value === null) {
            return false;
        }

        if ($this->expiration !== null) {
            if ($this->expiration < time()) {
                return false;
            }
        }

        return true;
    }
1276099
public function isSetter() {
    	$methodName = $this->getName();
    	
    	   
    	if (strpos($methodName, "set") === 0 && strlen($methodName)>3) {
    		// A setter must have exactly one compulsory parameter
    		$parameters = $this->getParameters();
    		if (count($parameters) == 0) {
    			return false;
    		}
    		if (count($parameters)>1) {
    			for ($i=1, $count=count($parameters); $i<$count; $i++) {
    				$param = $parameters[$i];
    				if (!$param->isDefaultValueAvailable()) {
    					return false;
    				}
    			}
    		}
    		
    		return true;
    	}
    	return false;
    }
381255
public function __isset($property)
    {
        switch ($property) {
            case 'mainLocation':
            case 'content':
                return true;
        }

        if (property_exists($this, $property) || property_exists($this->innerContentInfo, $property)) {
            return true;
        }

        return parent::__isset($property);
    }
1018906
public function __isset($name)
    {
        $name = strtolower($name);

        if ($name != 'x' && $name != 'y' && $name != 'z') {
            return false;
        }

        return isset($this->$name);
    }