Can I get around those (wrong) errors from Code Insight in Delphi?

Using latest WebCore in Delphi, when (for example) having to deal with the .context property of a TCanvas, the IDE shows errors and underlines the property in code (despite it compiles fine):
I understand that TCanvas is not defined in the design time units of WebCore, so I have to include Vcl.Graphics to use TCanvas. But the Vcl version of TCanvas doesn't know the .context property, so it shows this error.

My question is: Can I get around this sort of error? (without having to put those commands into {$IFNDEF WIN32} declarations.)

We did an adaption to make it accept Context at design time. Next update will have this adaption.