question: private boolean containsSingleMetric ( BufferedReader reader ) throws FormatParseException { try { reader . mark ( 1 ) ; char firstChar = ( char ) reader . read ( ) ; reader . reset ( ) ; return firstChar == '{' ; } catch ( IOException e ) { throw new FormatParseException ( "IOException while determining if single or multiple metrics " , e ) ; } }
target:  Determines if the given reader contains a single or multiple metrics.