从程序或者方法调用class里面方法的时候,方法的类型需要为静态
而且用=>符号
CALL METHOD /abcxx/xxxxxxxxxx=>fill_bseg_xref1

IF lv_actflg = 'X'.
CALL METHOD /abcxx/xxxxxxxxxx=>fill_bseg_xref1
EXPORTING
im_xref1 = i_febep-xref1
CHANGING
ch_ftpost = t_ftpost.
ENDIF.
Pattern -> ABAP Objects Patterns -> √ -> Class/Interface + Method -> √

