How to get dynamic paramete value in the context node?

Hi, experts,
There are some attributes in the node context(ee_node) that contained the attribute named "ANSSA" in the view(test_view) in the WDA for abap. In the method WDDOMODIFYVIEW of the view(test_view), there is dynamically string , ex."ANSSA". How can I get the value of the "ANSSA" from the node(ee_node)?
I try to use the following code to get the value in the method WDDOMODIFYVIEW of the view(test_view):
Method wddomodifyview.
*importing   para    type   string.
data:
    Node_Ee_Address                     type ref to If_Wd_Context_Node,
    Elem_Ee_Address                     type ref to If_Wd_Context_Element.
navigate from <CONTEXT> to <EE_ADDRESS> via lead selection
Node_Ee_Address = wd_Context->get_Child_Node( Name = IF_ADDR_AUTO_DISP_VIEW=>wdctx_Ee_Address ).
get element via lead selection
Elem_Ee_Address = Node_Ee_Address->get_Element( ).
get single attribute
Elem_Ee_Address->get_Attribute(
    exporting
      Name = para
    importing
      Value = ??? ).
But I don't know how to replace the "???"   .
endmethod
I don't know how to replace the "???" in the method wddomodifyview? Do you give me some hint for it?
You can reply back to me via e-mail if you think we should discuss this internally at [email protected] or [email protected]
Thanks.
Best regards,
tao

Hello Neha,
Thank you for your help in advance.
I am very sorry that the above method name ought to be "modifyview", not "wddomodifyview"(I write the error word in the question so that I am very sorry.). I am very sorry the error method name occuring your misunderstand.
The "para" is the transfered parameter that it is supposed to represent the name of "ANSSA". Actually, the "para" may represent other attribute in the node context, ex. "ENDDA"(date type) attribute.
I don't write such code in the method modifyview: lv_anssa like ls_ee_node-anssa. Because I am not sure that the "para" represent the name of "ANSSA", and the "para" may represent other attribute in the node context, ex. "ENDDA"(date type) attribute. The "para" is only the transfered parameter from other method for representing the name of attribute.
Method modifyview.
*importing para type string.
DATA:
lo_nd_ee_node type ref to if_wd_context_node,
lo_el_ee_node type ref to if_wd_context_element,
ls_ee_node type wd_this->element_ee_node.
I cann't write such code. Because I am not sure that the para represent the name of "ANSSA"******************
data lv_anssa like ls_ee_node-anssa.
lo_nd_ee_node = wd_context->get_child_node( name = wd_this->wdctx_ee_node ).
lo_el_ee_node = lo_nd_ee_node->get_element( ).
lo_el_ee_node->get_attribute(
exporting
name = para
importing
value = ??? ).
endmethod.
I don't know how to replace the "???". Do you give me more hints?
Thanks a million.
Regards,
Neha

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