feat(sdk): add SdkLogRecord::retain_attributes

Author: valkum

opentelemetry-sdk/src/logs/record.rs

@@ -264,6 +264,23 @@ impl SdkLogRecord {
         self.attributes
             .retain_mut(|attr| !matches!(attr, Some((k, _)) if k.as_str() == key.as_ref()))
     }
+
+    /// Retains only the attributes specified by the predicate.
+    ///
+    /// In other words, removes all pairs (k, v) for which f(&k, &mut v) returns
+    /// `false`.
+    ///
+    /// This gives mutable access to the values of the attributes, so they can
+    /// be modified in place.
+    pub fn retain_attributes<F>(&mut self, mut f: F) -> usize
+    where
+        F: FnMut(&Key, &mut AnyValue) -> bool,
+    {
+        self.attributes.retain_mut(|attr| match attr {
+            Some((k, v)) => f(k, v),
+            None => true,
+        })
+    }
 }
 
 /// TraceContext stores the trace context for logs that have an associated