Function Formatter.this

this (
  Sink sink,
  bool useTabs = false,
  IndentStyle style = IndentStyle.allman,
  uint indentWidth = 4


sink the output range that the formatted source code is placed in
useTabs if true, tabs are used for indent levels instead of spaces
style the brace style
indentWidth the number of spaces used for indentation if useTabs is false