/here/there/everywhere/ggplotnim/playground/column.nim(482, 12) Error: type mismatch: got <string>
but expected one of:
proc `&`(x: string; y: char): string
  first type mismatch at position: 2
  missing parameter: y
proc `&`[T](x: T; y: seq[T]): seq[T]
  first type mismatch at position: 2
  missing parameter: y
proc `&`(x, y: string): string
  first type mismatch at position: 2
  missing parameter: y
6 other mismatching symbols have been suppressed; compile with --showAllMismatches:on to see them

expression: &"Column of type: {toNimType(c.kind)} with length: {c.len}\n"