| assert_all_are_existing | Does the variable exist? |
| assert_all_are_valid_variable_names | Is the string a valid variable name? |
| assert_any_are_existing | Does the variable exist? |
| assert_any_are_valid_variable_names | Is the string a valid variable name? |
| assert_has_arg | Does the current call have an argument? |
| assert_is_binding_locked | Is the binding of a variable locked? |
| assert_is_debugged | Is the input function being debugged? |
| assert_is_if_condition | Is suitable to be used as an if condition |
| assert_is_loaded | Is the input a symbol in a loaded DLL? |
| assert_is_valid_r_code | Is the input valid R code? |
| has_arg | Does the current call have an argument? |
| has_arg_ | Does the current call have an argument? |
| is_binding_locked | Is the binding of a variable locked? |
| is_debugged | Is the input function being debugged? |
| is_error_free | Does the code run without throwing an error? |
| is_existing | Does the variable exist? |
| is_if_condition | Is suitable to be used as an if condition |
| is_loaded | Is the input a symbol in a loaded DLL? |
| is_valid_r_code | Is the input valid R code? |
| is_valid_variable_name | Is the string a valid variable name? |