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