Consolidate imports, wrap metadata in struct, update type constraints

x) Consolidate imports for Immutable collections
x) Wrap metadata into its own struct
x) Update type constraints for generic methods

Globals.cs

@@ -1,6 +1,9 @@
 
 
+global using Imm = System.Collections.Immutable;
+global using II = System.Collections.Immutable.ImmutableInterlocked;
+
 global using ImmArray = System.Collections.Immutable.ImmutableArray;
 global using ImmDict = System.Collections.Immutable.ImmutableDictionary;
 global using ImmSet = System.Collections.Immutable.ImmutableHashSet;
-global using II = System.Collections.Immutable.ImmutableInterlocked;
+

imm/iu.cs

@@ -7,7 +7,6 @@
 // x) Wrap metadata into its own struct
 // x) Make metadata a struct vs a class
 
-using imm;
 using System;
 using System.Runtime.CompilerServices;
 
@@ -22,20 +21,20 @@ static public class iu
 													[CallerLineNumber] int dbgLine = 0,
 													[CallerArgumentExpression("fn")]
 													string dbgExpression = default )
-		where T : Recorded<T>, Imm
+		where T : imm.Recorded<T>, imm.Imm
 	{
 		obj = obj.Process( fn, reason, dbgName, dbgPath, dbgLine, dbgExpression );
 		return obj;
 	}
 
-	static public Timed<T> Process<T>( ref Timed<T> obj, Func<T, T> fn,
+	static public imm.Timed<T> Process<T>( ref imm.Timed<T> obj, Func<T, T> fn,
 													string reason = "",
 													[CallerMemberName] string dbgName = "",
 													[CallerFilePath] string dbgPath = "",
 													[CallerLineNumber] int dbgLine = 0,
 													[CallerArgumentExpression("fn")]
 													string dbgExpression = default )
-		where T : Timed<T>, Imm
+		where T : imm.Timed<T>, imm.Imm
 	{
 		obj = obj.Process( fn, reason, dbgName, dbgPath, dbgLine, dbgExpression );
 		return obj;
@@ -49,7 +48,7 @@ static public class iu
 													[CallerLineNumber] int dbgLine = 0,
 													[CallerArgumentExpression("fn")]
 													string dbgExpression = default )
-		where T : Versioned<T>, Imm
+		where T : imm.Versioned<T>, imm.Imm
 	{
 		obj = obj.Process( fn, reason );
 		return obj;