get_meta_.default: Wrong class for 'get_meta_()'
In a-maldet/readall: Read FWF, DSV, EXCEL And SAS Files

Wrong class for get_meta_()

## Default S3 method:
get_meta_(
  obj,
  cols = NULL,
  err_h = composerr("Error while calling 'get_meta_()'"),
  ...
)

`obj`	A file_structure class object or a file_definition class object or a file_collection class object or a `data.frame` generated by the `read_data()` function (holds the meta information as attribute). The meta information will be extracted from this object.
`cols`	An optional object, defining for which columns the meta information should be retrieved. It can either be a character vector, holding the names of the columns of interest, or it can be numeric vector holding the indices of the columns of interest. If `cols` is omitted, then all columns are used.
`err_h`	An error handler
`...`	Additional arguments