| 1 | <?php  | 
            ||
| 34 | trait TMetaMember  | 
            ||
| 35 | { | 
            ||
| 36 | /**  | 
            ||
| 37 | * Get the meta member of the document.  | 
            ||
| 38 | *  | 
            ||
| 39 | * @return StandardObjectInterface  | 
            ||
| 40 | *  | 
            ||
| 41 | * @throws Exceptions\RuntimeException if the meta member is present and is not an object or null  | 
            ||
| 42 | */  | 
            ||
| 43 | public function getMeta() : StandardObjectInterface  | 
            ||
| 53 | |||
| 54 | /**  | 
            ||
| 55 | * @return bool  | 
            ||
| 56 | */  | 
            ||
| 57 | public function hasMeta() : bool  | 
            ||
| 61 | }  | 
            ||
| 62 | 
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.