core/src/main/java/org/springframework/security/core/authority/mapping/SimpleAttributes2GrantedAuthoritiesMapper.java
public List<GrantedAuthority> getGrantedAuthorities(Collection<String> attributes) {
		List<GrantedAuthority> result = new ArrayList<>(attributes.size());
		for (String attribute : attributes) {
			result.add(getGrantedAuthority(attribute));
		}
		return result;
	}
public List<GrantedAuthority> getGrantedAuthorities(Collection<String> attributes) {
		List<GrantedAuthority> result = new ArrayList<>(attributes.size());
		for (String attribute : attributes) {
			result.add(getGrantedAuthority(attribute));
		}
		return result;
	}
Map the given list of string attributes one-to-one to Spring Security
GrantedAuthorities.