@CompileStatic
class GroovyPrinter
extends DefaultPrinter

A org.jline.console.impl.DefaultPrinter that resolves nanorc highlight-style names case-insensitively. JLine matches the /prnt -s STYLE value (and the valueStyle/valueStyleAll options) against the syntax "<NAME>" header of each nanorc grammar with a case-sensitive String.equals (in org.jline.builtins.SyntaxHighlighter), so -s json would not match syntax "JSON". Rather than blindly transforming the requested style (which would break selecting a user's existing mixed-case grammars copied into ~/.groovy per the groovysh docs), this resolves the requested name case-insensitively against the actually configured syntax names — the same jnanorc org.jline.console.impl.DefaultPrinter itself uses (user-config first, via org.jline.builtins.ConfigurationPath) plus the grammars it includes. An exact match always wins; a unique case-insensitive match is rewritten to the real name; an unknown or an ambiguous name (where two grammars differ only by case) is passed through untouched so JLine's own behaviour is preserved. Discovery is failsafe per file and overall, the resolved set is cached, and the cache is cleared on refresh() so a /highlighter switch or a nanorc edit takes effect without a restart.