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/**

* @id java/examples/null-argument

* @name Add null to collection

* @description Finds places where we add null to a collection

* @tags null

* parameter

* argument

* collection

* add

*/

import java

from MethodAccess call, Method add

where

call.getMethod().overrides*(add) and

add.hasName("add") and

add.getDeclaringType().getSourceDeclaration().hasQualifiedName("java.util", "Collection") and

call.getAnArgument() instanceof NullLiteral

select call