I see a lot of code that calls the same function a number of times in the same
scope.
Is it better to store that result in a local variable, or is it better to
repeatedly call a method...
in this example, node() is called two times
return !m_renderer->node() || !m_renderer->node()->isContentEditable();
Would it better to write it as
Node* node = m_renderer->node();
return !node || !node->isContentEditable();
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