static int angle ( int n ) {
  return 2 * n ;
}

static int angle ( int n ) { return 2 * n ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (binary_expression left: (decimal_integer_literal) right: (identifier)))))