SoA: Public Getter for Names (#4187)

## Summary

Expose the names to public member functions.

## Additional background

Needed for Python bindings. Follow-up to #4163 

## Checklist

The proposed changes:
- [ ] fix a bug or incorrect behavior in AMReX
- [x] add new capabilities to AMReX
- [ ] changes answers in the test suite to more than roundoff level
- [ ] are likely to significantly affect the results of downstream AMReX
users
- [ ] include documentation in the code and/or rst files, if appropriate

Src/Particle/AMReX_StructOfArrays.H

@@ -52,6 +52,28 @@ struct StructOfArrays {
  /** Get access to the particle Int Arrays (only compile-time components) */
  [[nodiscard]] const std::array< IntVector, NInt>& GetIntData () const { return m_idata; }
 
+ /** Get the names for the real SoA components **/
+ [[nodiscard]] std::vector<std::string> GetRealNames () const
+ {
+ if (m_rdata_names) {
+ return *m_rdata_names;
+ }
+ else {
+ return std::vector<std::string>();
+ }
+ }
+
+ /** Get the names for the int SoA components **/
+ [[nodiscard]] std::vector<std::string> GetIntNames () const
+ {
+ if (m_idata_names) {
+ return *m_idata_names;
+ }
+ else {
+ return std::vector<std::string>();
+ }
+ }
+
  /** Get access to a particle Real component Array (compile-time and runtime component)
  *
  * @param index component with 0...NReal-1 compile-time and NReal... runtime arguments