code: public void setContentMargin(int l, int t, int r, int b) {
          mContentMargin[0] = l;
          mContentMargin[1] = t;
          mContentMargin[2] = r;
          mContentMargin[3] = b;
      }
docs: Set margin.
  
  @param l
  @param t
  @param r
  @param b