minor refactoring

library/src/commonMain/kotlin/net/sergeych/lyng/SymbolSpace.kt

@@ -0,0 +1,13 @@
+package net.sergeych.lyng
+
+
+
+class Symbols(
+    unitType: UnitType,
+    val name: String,
+    val x: TypeDecl
+) {
+    enum class UnitType {
+        Module, Function, Lambda
+    }
+}

library/src/commonMain/kotlin/net/sergeych/lyng/TypeDecl.kt

@@ -1,5 +1,21 @@
 package net.sergeych.lyng
 
 sealed class TypeDecl {
+    // ??
+    data class Fn(val argTypes: List<ArgsDeclaration.Item>, val retType: TypeDecl) : TypeDecl()
     object Obj : TypeDecl()
-}
+}
+
+/*
+To use in the compiler, we need symbol information when:
+
+- declaring a class: the only way to export its public/protected symbols is to know it in compiler time
+- importing a module: actually,  we cam try to do it in a more efficient way.
+
+Importing module:
+
+The moudule is efficiently a statement, that initializes it with all its symbols modifying some context.
+
+The thing is, we need only
+
+ */