checks the given boolean condition , and throws an illegalstateexception ifthe condition is not met evaluates to false . concode_field_sep PlaceHolder placeHolder concode_field_sep T checkNotNull concode_elem_sep T checkNotNull concode_elem_sep T checkNotNull concode_elem_sep String format concode_elem_sep void checkArgument concode_elem_sep void checkArgument concode_elem_sep void checkArgument concode_elem_sep void checkElementIndex concode_elem_sep void checkElementIndex
void function ( boolean arg0 , @ Nullable String arg1 , @ Nullable Object ... arg2 ) { if ( ! arg0 ) { throw new IllegalStateException ( format ( arg1 , arg2 ) ) ; } }