Can't use binary as a base type

[mglazer]

What happened?

I tried:

types:
  imports:
    Response:
      base-type: binary
      external:
        java: javax.ws.rs.core.Response

It failed with:

  Caused by: java.lang.IllegalArgumentException: TypeNames must be a primitive type [any, string, integer, double, boolean, safelong, rid, bearertoken, uuid] or match pattern ^[A-Z][a-z0-9]+([A-Z][a-z0-9]+)*$: binary
        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:455)
        at com.palantir.conjure.parser.types.names.TypeName.check(TypeName.java:46)
        at com.palantir.conjure.parser.types.names.ImmutableTypeName.validate(ImmutableTypeName.java:110)
        at com.palantir.conjure.parser.types.names.ImmutableTypeName.access$200(ImmutableTypeName.java:30)
        at com.palantir.conjure.parser.types.names.ImmutableTypeName$Builder.build(ImmutableTypeName.java:197)
        at com.palantir.conjure.parser.types.names.TypeName.of(TypeName.java:54)
        at com.palantir.conjure.parser.types.primitive.PrimitiveType.fromString(PrimitiveType.java:70)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.fasterxml.jackson.databind.introspect.AnnotatedMethod.callOnWith(AnnotatedMethod.java:122)
        at com.fasterxml.jackson.databind.deser.std.FactoryBasedEnumDeserializer.deserialize(FactoryBasedEnumDeserializer.java:138)
        ... 64 more

What did you want to happen?

I want a binary base type to be supported.