static boolean d ( int x , int y ) {
  return 0 <= x && x < 4 && 0 <= y && y < 4 ;
}

static boolean d ( int x , int y ) { return 0 <= x && x < 4 && 0 <= y && y < 4 ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (return_statement (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (decimal_integer_literal) right: (identifier))) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))