lets see how we can do this

src/fsfw/cfdp/handler/CMakeLists.txt

@@ -1,4 +1,4 @@
 target_sources(
   ${LIB_FSFW_NAME}
   PRIVATE SourceHandler.cpp DestHandler.cpp MetadataParser.cpp
-          PutRequestReader.cpp FaultHandlerBase.cpp UserBase.cpp)
+PutRequest.cpp FaultHandlerBase.cpp UserBase.cpp)

src/fsfw/cfdp/handler/MetadataParser.h

@@ -9,6 +9,7 @@ class MetadataParser {
   explicit MetadataParser(MetadataPduReader& reader);
 
  private:
+
 };
 
 }  // namespace cfdp

src/fsfw/cfdp/handler/PutRequest.cpp

@@ -0,0 +1,5 @@
+#include "PutRequest.h"
+
+[[nodiscard]] bool cfdp::PutRequest::isMetadataOnly() const {
+  return !destNameSize.has_value() and !sourceNameSize.has_value();
+}

src/fsfw/cfdp/handler/PutRequest.h

@@ -21,9 +21,7 @@ class PutRequest {
   std::vector<MessageToUserTlv> messagesToUser;
   std::vector<FilestoreRequestTlv> fsRequest;
 
-  [[nodiscard]] bool isMetadataOnly() const {
+  [[nodiscard]] bool isMetadataOnly() const;
-    return !destNameSize.has_value() and !sourceNameSize.has_value();
-  }
 };
 
 }  // namespace cfdp

src/fsfw/cfdp/handler/PutRequestReader.cpp

@@ -1 +0,0 @@
-#include "PutRequestReader.h"