FindBestMatch employs fuzzy matching to evaluate the similarity of each given identifier to the given pattern.

FindMatchingIdents finds all identifiers in 'node' that match any of the given types.

IsZeroValue checks whether the given expression is a 'zero value' (as determined by output of analysisinternal.ZeroValue).

StmtToInsertVarBefore returns the ast.Stmt before which we can safely insert a new variable.

WalkASTWithParent walks the AST rooted at n.