Content-Type: text/html
Content-Length: 727

Empty string vs void:
Json: "" vs null
Json (void as string): "" vs ""
Json (void as null): "" vs null
Length: 0 vs 0
Double: 0 vs 0
Base64: "" vs ""
Hash compatibility: "" "" ""
More hash compatibility: "false" "false" "false"
Methods are not visible: "void" "void" "void"
Non-empty or whitespace string not hash compatible: Type: parser.runtime,
Source: key,
Comment: element can not be fetched from string
Absent method empty string error: Type: parser.runtime,
Source: something,
Comment: string method not found
Absent method void error: Type: parser.runtime,
Source: something,
Comment: void method not found
Absent method non-empty string error: Type: parser.runtime,
Source: something,
Comment: string method not found