Can we know the context of a Node from a plugin

[orklah]

Hi,

I'm at my second plugin idea where I would need to know the immediate surroundings of a Node to prevent making a mess while replacing code.

For my current plugin, I want to search and replace literal strings by an existing public constant who would have the same value.

This works super well, but it even replace this code:

class A{
    const A = 'A';
}

to

class A{
    const A = A::A;
}

To prevent that, I would just need to know some more context. Is there a way to navigate the AST or some other way to get more context from a Node?