Macro get_attribute_errors_expected 

macro_rules! get_attribute_errors_expected {
    ($self:ident, $map:expr, $prop:expr, $type:path) => { ... };
}

Obtains an attribute from a map and ensures it matches the expected type.

Arguments

• $self - The struct or instance on which the function is invoked.
• $map - The data map.
• $prop - The attribute key.
• $type - The expected enum path.