static double crossProduct ( Point a , Point b ) {
  return a . x * b . y - a . y * b . x ;
}

static double crossProduct ( Point a , Point b ) { return a . x * b . y - a . y * b . x ; }
(method_declaration (modifiers) type: (floating_point_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (type_identifier) name: (identifier))) body: (block (return_statement (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (field_access object: (identifier) field: (identifier))) right: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (field_access object: (identifier) field: (identifier)))))))