code: func (t TabularData) ToMap() TabularDataMap {
  	m := TabularDataMap{}
  	if len(t) > 1 {
  		for _, th := range t[0] {
  			m[th] = []string{}
  		}
  		for _, tr := range t[1:] {
  			for c, td := range tr {
  				m[t[0][c]] = append(m[t[0][c]], td)
  			}
  		}
  	}
  	return m
  }
docs: // ToMap converts a regular table to a map of header names to their row data.
  // For example:
  //
  //     t := TabularData{[]string{"header1", "header2"}, []string{"col1", "col2"}}
  //     t.ToMap()
  //     // Output:
  //     //   map[string][]string{
  //     //     "header1": []string{"col1"},
  //     //     "header2": []string{"col2"},
  //     //   }