normalization of methods

lib/trends_FIR/conv/Conv.cs

@@ -22,6 +22,7 @@ public sealed class Conv : AbstractBase
     private readonly ITValuePublisher? _source;
     private readonly TValuePublishedHandler? _subHandler;
     private bool _isNew = true;
+    private bool _disposed;
 
     private record struct State(double LastValidValue);
     private State _state;
@@ -56,9 +57,13 @@ public sealed class Conv : AbstractBase
 
     protected override void Dispose(bool disposing)
     {
-        if (_source != null && _subHandler != null)
+        if (!_disposed)
         {
-            _source.Pub -= _subHandler;
+            if (disposing && _source != null && _subHandler != null)
+            {
+                _source.Pub -= _subHandler;
+            }
+            _disposed = true;
         }
         base.Dispose(disposing);
     }
@@ -276,6 +281,13 @@ public sealed class Conv : AbstractBase
         }
     }
 
+    public static (TSeries Results, Conv Indicator) Calculate(TSeries source, double[] kernel)
+    {
+        var indicator = new Conv(kernel);
+        TSeries results = indicator.Update(source);
+        return (results, indicator);
+    }
+
     public override void Reset()
     {
         _buffer.Clear();
@@ -283,4 +295,4 @@ public sealed class Conv : AbstractBase
         _p_state.LastValidValue = double.NaN;
         Last = default;
     }
-}
+}