Define substitute, split off generic code (#12)

Author: mtfishman

Project.toml

@@ -1,7 +1,7 @@
 name = "ITensorNetworksNext"
 uuid = "302f2e75-49f0-4526-aef7-d8ba550cb06c"
 authors = ["ITensor developers <[email protected]> and contributors"]
-version = "0.1.8"
+version = "0.1.9"
 
 [deps]
 AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"
@@ -17,6 +17,7 @@ NamedGraphs = "678767b0-92e7-4007-89e4-4527a8725b19"
 SimpleTraits = "699a6c99-e7fa-54fc-8d76-47d257e15c1d"
 SplitApplyCombine = "03a91e81-4c3e-53e1-a0a4-9c0c8f19dd66"
 TermInterface = "8ea1fca8-c5ef-4a55-8b96-4e9afe9c9a3c"
+TypeParameterAccessors = "7e5a90cf-f82e-492e-a09b-e3e26432c138"
 WrappedUnions = "325db55a-9c6c-5b90-b1a2-ec87e7a38c44"
 
 [compat]
@@ -33,5 +34,6 @@ NamedGraphs = "0.6.9, 0.7"
 SimpleTraits = "0.9.5"
 SplitApplyCombine = "1.2.3"
 TermInterface = "2"
+TypeParameterAccessors = "0.4.4"
 WrappedUnions = "0.3"
 julia = "1.10"