# Documentation

Lean.Meta.KAbstract

Abstract occurrences of p in e. We detect subterms equivalent to p using key-matching. That is, only perform isDefEq tests when the head symbol of substerm is equivalent to head symbol of p. By default, all occurrences are abstracted, but this behavior can be controlled using the occs parameter.

Equations
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def Lean.Meta.kabstract.visit (p : Lean.Expr) (pHeadIdx : Lean.HeadIndex) (pNumArgs : Nat) (e : Lean.Expr) (offset : Nat) :