added call method on query

Author: transistive

src/Query.php

@@ -21,6 +21,7 @@
 
 namespace WikibaseSolutions\CypherDSL;
 
+use WikibaseSolutions\CypherDSL\Clauses\CallClause;
 use WikibaseSolutions\CypherDSL\Clauses\CallProcedureClause;
 use WikibaseSolutions\CypherDSL\Clauses\Clause;
 use WikibaseSolutions\CypherDSL\Clauses\CreateClause;
@@ -55,6 +56,7 @@
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\NodeType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\PathType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\StructuralType;
+use function call_user_func;
 
 /**
  * Builder class for building complex Cypher queries.
@@ -635,6 +637,28 @@ public function callProcedure(string $procedure, array $arguments = [], array $y
         return $this;
     }
 
+    /**
+     * Creates a CALL sub query clause.
+     *
+     * @param callable(Query) $decorator The callable decorating the pattern.
+     *
+     * @return Query
+     *
+     * @see https://neo4j.com/docs/cypher-manual/current/clauses/call-subquery/
+     */
+    public function call($decorator): self
+    {
+        self::assertClass('decorator', 'callable', $decorator);
+
+        $subQuery = self::new();
+
+        $decorator($subQuery);
+
+        $this->clauses[] = new CallClause($subQuery);
+
+        return $this;
+    }
+
     /**
      * Add a clause to the query.
      *