docs: function validate( opts, options ) {
  	if ( !isObject( options ) ) {
  		return new TypeError( 'invalid argument. Options argument must be an object. Value: `' + options + '`.' );
  	}
  	if ( options.hasOwnProperty( 'strict' ) ) {
  		opts.strict = options.strict;
  		if ( !isBoolean( opts.strict ) ) {
  			return new TypeError( 'invalid option. Strict option must be a boolean primitive. Option: `' + opts.strict + '`.' );
  		}
  	}
  	return null;
  }