unmarshall-settings in drscheme:language:simple-module-based-language->module-based-language-mixin

This method is the same as unmarshall-settings.

• (send a-drscheme:language:simple-module-based-language->module-based-language-mixin unmarshall-settings input) -> (union #f settings)
     input : writable

  Builds a settings structure from the vector, or #f if the vector doesn't match the types of the structure.

  See also section 3.19 for details of the simple-settings structure, this mixins settings type.