finish pq\Query

[mdref/mdref-pq-gateway] / pq-gateway / pq / Query / ExpressibleInterface / isExpr.md

diff --git a/pq-gateway/pq/Query/ExpressibleInterface/isExpr.md b/pq-gateway/pq/Query/ExpressibleInterface/isExpr.md
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+# bool pq\Query\ExpressibleInterface::isExpr()
+
+Check whether the implementor already contains a expression, i.e. pq\Query\Expr.
+
+## Params:
+
+None.
+
+## Returns:
+
+* bool, whether we actually contain an expression.
+