Function nix_get_external 

pub unsafe extern "C" fn nix_get_external(
    context: *mut nix_c_context,
    value: *mut nix_value,
) -> *mut ExternalValue

Get external reference @ingroup value_extract

Arguments

• context [out] - Optional, stores error information
• value [in] - Nix value to inspect

Returns

reference valid while value is valid. Call nix_gc_incref() if you need it to live longer, then only in that case call nix_gc_decref() when done. NULL in case of error