ldap/src/main/java/org/springframework/security/ldap/userdetails/LdapUserDetailsManager.java
public void setGroupMemberAttributeName(String groupMemberAttributeName) {
		Assert.hasText(groupMemberAttributeName, "groupMemberAttributeName should have text");
		this.groupMemberAttributeName = groupMemberAttributeName;
		this.groupSearchFilter = "(" + groupMemberAttributeName + "={0})";
	}
public void setGroupMemberAttributeName(String groupMemberAttributeName) {
		Assert.hasText(groupMemberAttributeName, "groupMemberAttributeName should have text");
		this.groupMemberAttributeName = groupMemberAttributeName;
		this.groupSearchFilter = "(" + groupMemberAttributeName + "={0})";
	}
Sets the name of the multi-valued attribute which holds the DNs of users who are
members of a group.
<p>
Usually this will be <tt>uniquemember</tt> (the default value) or <tt>member</tt>.
</p>

@param groupMemberAttributeName the name of the attribute used to store group
members.