Function rb_obj_singleton_methods 

pub unsafe extern "C" fn rb_obj_singleton_methods(
    argc: c_int,
    argv: *const VALUE,
    obj: VALUE,
) -> VALUE

Identical to rb_class_instance_methods, except it returns names of singleton methods instead of instance methods.

@param[in] argc Number of objects of argv. @param[in] argv Array of at most one object, which controls (if any) whether the return array includes the names of methods defined in ancestors or not. @param[in] obj Arbitrary ruby object. @exception rb_eArgError argc out of range. @return An array of symbols collecting names of instance methods that are not private, defined at the singleton class of obj.

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3