[5/x][dynamic child loading] Added unit tests. Fixed bug.

[tnowacki]

• Added negative unit tests for dynamic_field and dynamic_object_field

• Fixed a bug where the struct tag was not checked

• Built on #5169

[amnn]

I've slightly lost the plot from this point on which bits are part of #5169 and which are new -- is there a way to get that info?

[tnowacki]

I've slightly lost the plot from this point on which bits are part of #5169 and which are new -- is there a way to get that info?

When viewing the files, you can select the range of commits to view

[amnn]

When viewing the files, you can select the range of commits to view

🤦 yep, yep -- I had this as a shower thought this morning.