Sass recently introduced a new API for controlling how deprecations are handled. The new API introduced three new optional fields to the CompileRequest protobuf: fatal_deprecation, silence_deprecation and future_deprecation. Currently the only possibility to set these fields seems to be overriding the compileRequestBuilder method in SassCompiler.

Would it be possible to add methods for setting those fields directly from the SassCompiler? I will gladly submit a PR for this.