[rules-users] Usage of 'exists' keyword to get the number of occurance?

[Rajesh.Sachin10]

Its possible to use 'exists' keyword to get the number of occurance?

Eg:

context : Context(state == Context:START_UP) exists ClassName(varName ==
"value")


The ClassName is an Object array..... So to get the number of occurance of
the "value" in varName, we have any method or keywords?
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