keep istree but deprecate

Shashi Gowda · Shashi Gowda · commit 9d86f9ec90fc · 2024-04-11T21:48:28.000-04:00
diff --git a/src/SymbolicUtils.jl b/src/SymbolicUtils.jl
@@ -23,6 +23,7 @@ import TermInterface: iscall, isexpr, issym, symtype, head, children,
 # Add, Mul and Pow
 include("types.jl")
 export similarterm
+Base.@deprecate_binding istree iscall
 
 # Methods on symbolic objects
 using SpecialFunctions, NaNMath
