R/plate_functions.R
    display_plate.RdDisplay plate plan with sample_id, target_id, prep_type per well
display_plate(plate)| plate | tibble with variables well_col, well_row, sample_id, target_id, prep_type. Output from label_plate_rowcol.  | 
    
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ggplot object; major output is to plot it
Other plate creation functions: 
create_blank_plate(),
create_colkey_4diln_2ctrl_in_24(),
create_colkey_6_in_24(),
create_colkey_6diln_2ctrl_in_24(),
create_rowkey_4_in_16(),
create_rowkey_8_in_16_plain(),
label_plate_rowcol()
# !Needs a labeled example from label_plate_rowcol...