[Core] Improve performance: remove unnecessary loop on SimpleCallableNodeTraverser #3053
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Loop over nodes with verify parent Node was introduced on PR:
to handle private method used in FuncCall with ArrowFunction.
This PR try to improve performance by remove the loop, with simplified solution by verify:
passed node variable is a Node
otherwise, it is an array of Nodes, which mostly usage is by pass
$node->stmts
, which parent node is the$node
so no need to loop over to verify.