Serialize the mask to the wire-format string.
StaticbuildInternalBuild a FieldMask from typescript field name paths against the target message's schema. Validates every path by walking each segment through the schema and throws Error when any segment fails.
Reserved for generated per-message factories; user code should call the factory (e.g. alertFieldMask(...)), which supplies the schema before delegating here.
A field mask implementing google.protobuf.FieldMask semantics.