method
exists?

exists?(p1)
public
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static VALUE rb_file_exists_p(VALUE obj, VALUE fname) { const char *s = "FileTest#"; if (obj == rb_mFileTest) { s = "FileTest."; } else if (obj == rb_cFile || (RB_TYPE_P(obj, T_CLASS) && RTEST(rb_class_inherited_p(obj, rb_cFile)))) { s = "File."; } rb_warning("%sexists? is a deprecated name, use %sexist? instead", s, s); return rb_file_exist_p(obj, fname); }