FG:
  fm_yaml:   'system.file(package="formods", "templates", "formods.yaml")'
  mod_yaml:  'system.file(package="formods", "templates", "FG.yaml")'
  elements:
    - element:
        idx: 1
        name:   "3 mg SD IV"
        # The data source contains the module ID (text) and the index used in
        # the module to identify the data source. When you use FM_fetch_ds to
        # identify data sources in other modules it creates a catalog data
        # frame. These correspond to the id and idx columns in that data frame.
        data_source:
          id:   "DW"  # Module ID
          idx:    2   # Data source index
        # Components must have a type field this can be a type defined by 
        # aesthetics (like geom_line). 
        components:     
          - component:
              type:     "line"
              aes:
                'x':        "TIME_DY"
                'y':        "DV"
                'color':    "CMT"
                'group':    "ID"
          - component:
              type:     "label"
              options:
                'xlab':    "Time (Days)"
                'ylab':    "Conc (n/gml)"
